The Unbreakable Pencil – Zebra DelGuard – Gadgets Under $10


This looks like a perfectly normal mechanical
pencil. But it actually has a lot of interesting engineering
to solve one frustrating thing. Broken lead. Hi I’m David and this is the Zebra Delguard. The unbreakable lead pencil. So let’s look at this pencil in action. During typical operation it works and feels
like any normal mechanical pencil, but if you’re a heavy writer who applies too much
pressure on your lead tip, that’s where the Delguard protective mechanism kicks in
to prevent the lead from breaking. But let’s take a closer look. Pressing down firmly on the lead at an angle
and you’ll see the sleeve tip extends out to protect the lead. Or if you press down vertically on the lead
it will auto retract inside again protecting the lead from breaking. It’s the combination of these two mechanisms
that makes it almost impossible to break the lead no matter how much pressure I put on
it. Opening up the pencil give us a better idea
on how it works. This is the chuck, it’s the part of the
pencil that dispenses and holds the lead in place and makes that clicky noise when you
press on the cap. But what’s special in this case is the suspension
of the chuck. On this pencil the chuck is held in place
by a spring that allows it to move around freely from the rest of the pencil. With enough pressure the spring will compress
and push deeper inside the case. But it also has a lot of flexibility to bend
off axis from the rest of the body when you press on the lead at an angle. The next part to look at is the sleeve or
guard of the lead pencil. And this part is designed to extend out and
shield the lead when you press down on it at an angle. The sleeve is held in place by a spring but
when you pull it out you can see that the sleeve isn’t cylindrical but instead curved
like a spinning top. So when you apply a perpendicular force to
the sleeve, the curved shape causes it to extend out and shield the lead from breaking. This dual spring design makes it almost impossible
to break the lead on your pencil from pressure alone. But it does have some limitation. The DelGuard pencil comes with the warning:
Lead may break when retracting the lead more than 3 times or using a softer lead. And this makes sense because the guard system
is only design to extend out so far. So any part of the lead that extends past
the range of guard just can’t be protected. So that’s the Zebra Delguard mechanical
pencil. A pretty cool feat of engineering to solve
the problem of lead breaking for heavy handed writers. But if you don’t have an issue with breaking
your lead, it feel just like any normal lightweight mechanical pencil. In that case, maybe check out the Uni Kuru
Toga. Another pretty nifty piece of pencil engineering. But hope you guys enjoyed this one. You know what to do. And I’ll see you in the next video.

100 comments

  • Tulhaa Bhatti

    I have that pencil

    Reply
  • Ronaldo Isidro

    I got one its blue standard type

    Reply
  • FRANK GAMES COMPS

    “This pencil is almost unbreakable”

    Me: hold my beer ?

    Reply
  • Happy Natsu

    Ok so when he broke the lead in the beginning of the video did anyone else feel it fling into their eye? ???

    Reply
  • Jennifer Grove

    It is now on my Amazon Wish List.
    Thank you.

    Reply
  • bruh grr anger

    Why is this available in my Walgreens… WHY

    Reply
  • allan gaikwad

    What HB#

    Reply
  • pun pun paws

    I actualy have that EXACT MECHANICAL PENCIL RIGHT KNOW THATS WHY I CLICKED ON THIS VID

    . o .

    Reply
  • スーパーおとら。

    日本のペンは凄いですよね

    Reply
  • ESPRESSO DEPRESSO

    Pffffft pilot pencils are better hell my friend is heavy handed and it barely breaks

    Reply
  • Not Razor

    I broke it with my finger

    Reply
  • Zedicorn Jenkins

    "This looks like a perfectly normal mechanical pencil"

    um, no it doesn't

    Reply
  • NexX

    ive been looking for this music 0:14

    Reply
  • Yuruske

    just wair till you lose it

    Reply
  • グラフGrapH

    Japanese pen サイコー

    Reply
  • Duster McClean

    It’s true i have bought one and it works!

    Reply
  • Eduardo Carrasco

    Can't believe I just watched a review on a pencil. Good job sir.

    Reply
  • hunter ricard

    i’m excited to use this, i’m the type of person that keeps the same pen for like a year

    Reply
  • Erik Zaragoza

    I have this its okay but the eraser is small

    Reply
  • Jazzy Jay

    I brought mine for $5!

    Reply
  • Z A N O K 3720

    Pencil is unbreakable

    Reply
  • AB

    Lol I have the purple one with dots and it breaks pretty often if I write fast and press hard. Just buy a normal one.

    Reply
  • Jack Rowland

    just ordered it comes in today extremely excited mostly because I always run out of lead because I break it all the time

    Reply
  • a v o c a d o

    I neeeed this

    Reply
  • Laser Sharp

    Does the sleeve touch the paper and create friction? I like a smooth writing experience with soft lead on paper.

    Reply
  • Ian Choi

    My zebra delguard broke but still works if u know what I mean and sometimes it just shoots the grip out like a gun and people in my class wants to trade me something for it and an annoying kid in my class said he’ll give it to me for $70 bucks lol
    But NO
    Cause the chance of that happening is rare.
    Oh and if u hold the grip and THEN press the button the lead comes out

    Reply
  • Soulless Bunny 1999

    I have that pencil and the lead kept breaking
    Turns out I had it out to much and used to much pressure

    Reply
  • Zygardious YT

    So when this video just came out I said I'll buy it, and 2 years later….
    MOM! can I buy this….
    Mom: Sure
    Me:Holy Sh*t Yes! Only 2 years to get!

    Reply
  • Ryan Vo

    Great video! I’ve just ordered one from Amazon, can’t wait!

    Reply
  • Gaming TV

    I have the same pencil before watching the vid.
    Amazing cant believe

    Reply
  • 時透無一郎

    デルガードやん

    Reply
  • Poke Logic

    I got it and I LOVE IT

    Reply
  • Twenty Øne Llamas at the Disco !

    BUT can you put the lead in from the tip?

    Reply
  • Mütevazı Egoist

    It's pretty cool but…

    WILL IT STOPS THE SMUDGE?

    (only genius ppl will understand and cry with me)

    Reply
  • one cent

    I have had this thing for almost a year and i love it.

    Reply
  • Marcus Tuegeon

    I agreed

    Reply
  • Ravi Harripersad

    I have it

    Reply
  • Trump's Tiny Hands

    I love my delguard

    Reply
  • Chemiosmosis

    I bought this pencil right after I saw your video. It's been two years, I am 100% satisfied with this pencil.

    Reply
  • Aesthetic Freak•

    I have this one, uwu.

    Reply
  • Josh Stewart

    i dont lose pens so i dont have a problem with buying something like this where you only have one of them at a time so im definitely going to get this now

    Reply
  • Thyme V

    me: puts 6 inch lead inside
    me: puts the whole lead out
    also me: stabs paper perdendicularly
    lead pencil: breaks
    me: i want a refund….

    Reply
  • Foxer’s forest of fun

    Me while using a mechanical pencil in school: in the text uh crap I just broken the led ok in the text it says crap I ddI it agin I give up throwing the pencil in the garbage and I pull out a pen that later I will break to

    Reply
  • Morty plush productions

    I bought the DelGaurd it is SO GOOD FOR DRAWING AND WRITING!!! (In love with it❤??)

    Reply
  • Susan Rosario

    The lead will break if you take a bunch of that out so technically this is not a unbreakable pencil you could literally break the lead and break the pencil itself

    Reply
  • EvanTtube Gaming

    I bought it and it broke ?

    Reply
  • The Smiling Potato Gamer

    I got that pencil and used it for 4 months and then the easer was dead. I liked it because it could cut paper and you didn't even mention that part.

    Reply
  • ToG

    Here’s the word unbreakable
    Smacks it on his leg it snapped
    “Oh shit”

    Reply
  • Azurite HD

    I used my Jedi powers to break it

    Reply
  • Daniel Gonzalez-Jimenez

    Mine was stolen by a classmate never got it back and when I went to the stores to buy it it was out of stock?

    Reply
  • epistte

    If you push down so hard to be able to break the lead that is your own problem, so change the way you hold the pencil. You might want to only have 1/16 or 2 mm of lead outside the guard. I have a pile of Kohinoors and Rotings as an mechical engineer so I know more than a little about mechanical pencils.

    Reply
  • Raz

    well nothing is unbreakable for my dumbass

    Reply
  • 郎鐐太

    こういう日本の物が外国で評価される動画見てると誇りに思う

    Reply
  • Dawson Stemmler

    It may be unbroken but I lost the silver eraser cover in 2 days…

    Reply
  • sftwr314r8

    yes, but no eraser…….

    Reply
  • Shadorra

    I am sure i could brake it anywayy :I

    Reply
  • Arsenii Listopadov

    How can i get it in Russia?

    Reply
  • Trash Racoon

    Me: hiding broken led in my poket
    {_/}
    (•~•)
    />?

    Reply
  • panda_ぜるかゔぁ

    クルトガ、おられてて草

    Reply
  • Tuguldur Bat-erdene

    Me: what if i burn it
    My brother: it will break

    Reply
  • popstarprincess123

    You said almost impossible to break
    So how do you break the lead

    Reply
  • J’Aabi Joestar

    Yea I’ll stick with my stylus.

    Reply
  • Yukue

    Hi, David! What do you prefer, the Uniball Kuru Toga or this one?

    Reply
  • Bloats

    Me: Hey I just got this pencil and it’s supposed to be unbreakable!

    Give pencil to friend

    Friend: Oh yeah? Watch this. Snaps pencil in half

    Me: … I meant the lead

    Friend: Oh…

    Reply
  • RealTuff

    It’s all fun and games until the protective mechanism breaks

    Reply
  • Nonya Business

    le cri I want the shaker Tombow mixed with this and then with the Uni-Alpha Shaker. But alas, I'M NO ENGINEER XD

    Reply
  • Marcus Tuegeon

    This delguard is so strong that when my friend in school tried to break it with his regular wooden pencil, the delguard broke my friend's ✏️ into pieces XD

    Reply
  • Let me Die

    Or don't extend the lead out too much and have lighter pressure

    Reply
  • Yoitsjerald

    W

    Reply
  • Jayash Pande

    Does it rotate like the uni Kurutoga?

    Reply
  • Laser Sharp

    Does the metal touch the paper while writing?

    Reply
  • Leon Pang

    I used to have it but the mechanical thingy broke.

    Reply
  • Hunt with Hunter2461

    Let me just get my chainsaw…

    Reply
  • Random Kill Fire Gamer

    What is the cost bro

    Reply
  • Otto Gonzalez

    John wick's pencil

    Reply
  • furiousdevilet

    Pencil is Unbreakable

    Reply
  • Antonio Renteria

    ive had this pencil fora year, i completely forgot the lead presses back,

    Reply
  • 葉隠ハガクレ

    1000円もするの?!!!!

    Reply
  • JNcustom35

    I was deciding between this or rotring 600… bought both for school

    Reply
  • Mod World

    Id it good for drawing and sketching ??

    Reply
  • LordTime Bomb

    Eraser measurements?????

    Reply
  • TooOld ForTwoWheels

    I've always found mechanical pencils beautiful to write with, I don't know why. I've had on of thsee for a few weeks and a great $3 piece.

    Reply
  • Just.SoManyCups

    You show your friends this they go "let me borrow it"
    And at this moment he knew…he fucked up

    Reply
  • Q S

    I have both the delguard and the uni kuru toga. I use both pretty heavily and they are AMAZING pencils!

    Reply
  • 1k Subs with No Vids

    I demand that you let me permanently borrow your kuru toga roulette and your Pentel orenz Nero 0.2

    Reply
  • Bakir Colic

    Enchanted with mending

    Reply
  • Kj

    i have this one ? i got it form free meyers

    Reply
  • alfred

    i just dropped it in class today, forgot to pick it up went to the washroom and someone stole it, smh. Found it was my teacher, she put it in her pencil case

    Reply
  • Rykel Lim

    I have both the Uni Kuru Toga and Zebra DelGuard, thinking that they are both "unbreakable" pencils… but ONLY the DelGuard manages to prevent my lead from breaking (maximum 2 clicks, not 3!) – and I am indeed using 4B leads.

    Reply
  • ItzFrosted

    add a tracking system in pencils and ill be impressed. it's like find my iphone but it's find my pencil

    Reply
  • clean pops

    i found this on the ground at school and threw it :<

    Reply
  • Adil Parray

    What the frak?
    I ordered it two days ago.. it will reach in next two days.
    AND YOUTUBE RECOMMENDED THIS TODAY???

    Reply
  • LiL_ RaVENBoi

    What is with everyone losing it

    Reply
  • Nico Enerlan

    It’s kind of I ironic that I broke the plastic tip of this mechanical pencil while I was using it.

    Reply
  • Wittle duck artz

    I have it

    Reply
  • flipflops

    I got this as a gift 2 weeks later i lost it im upset

    Reply
  • ShyFetcher

    So if i throw this in the microwave for 2 hours it wont break?
    (◕‿‿◕)

    Reply
  • Big Boi

    I own this pencil and i didnt know it was unbreakable ._.

    Reply
  • Adam Holbrook

    Wish they had larger erasers…

    Reply
  • mr casul

    I love this thing so much

    Reply

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