Internet #202242749

Model #GT300

Store SKU #911142

1/4 in. Carbide-Tipped Glass and Tile Drill Bit

  • Diamond-ground centering tip ideal for drilling in glass and tile
  • Three-flat shank provides superior grip for use in rotary drills
  • Precision tip for no-skate starts; reinforced head for durability
  • See More Details

Frequently Bought Together


Product Overview

Bosch Glass and Tile bit drilling into tile wall

Glass and Tile Bit

The bit is designed with diamond-ground cutting edges, ideal for drilling in glass and bath installs.

Bosch Glass and Tile bit drilling into glass subway tile

Long Bit Life

These bits feature high-quality carbide construction, reinforced heads and three flat shanks for long bit life.

Close up of Bosch Glass and Tile bit. EXACT NO-SKATE STARTS.

Precision Ground Tips

The innovative bit geometry allows the bit to drill faster with reduced bit walking.

Four Glass and Tile bits various sizes

Specialty Bits

These bits are engineered for clean drilling in glass and porcelain tile.

Close up of Bosch Glass and Tile bit tip

Extra Sharp Edges

Starts the hole in bathroom tile, then bores to the diameter needed.

Bosch Glass and Tile bit drilling into tile

Kitchen, Bath Applications

Useful for holes for towel and shower rods, toilet paper holders and soap dishes.

Close up of Glass and Tile bit shank

Three-Flank Shank

Superior bit grip for control, to reduce the chance of a cracked surface.

Speed dial icon

Faster Drilling

The precision tip provides fast drilling in glass and tile applications.

Icon of skate with circle and cross on top

No-Skate Starts

The special centering tip reduces bit skating, avoiding a marred surface.

Icon of four tiles in a square

Made For Glass and Tile

These bits are ideal for relief holes for glass and mirror installs.

Bit tip icon

Reinforced Head

The reinforced carbide head provides longer life in glass and tile.

Hourglass icon

Longer Life

This bit's carbide tip and a three-flat shank combine for durability.

Water drop with circle and cross on top

No Water Needed

For glass and tile, this bit is designed to work without requiring water.

Glass and tile applications have never been easier. Nobody but Bosch is offering the innovation found in our product design. Our product features an unique product geometry with a precision tip, high quality carbide and reinforced head that results in best-in-class speed and life when cutting in glass and tile.
  • Precision tip solves bit wander and bit walking
  • High quality carbide with a reinforced head that prevents bit cracking and provides a longer life
  • 3-flat shank to prevent slippage
  • Bosch branded, innovative geometry allows bits to drill faster



Assembled Depth (in.)
.2 in
Assembled Height (in.)
6.95 in
Assembled Width (in.)
1.82 in
Bit Diameter
1/4 in
Bit Length (in.)
Shank Diameter
1/4 in


Bit Material
Drill Bit Type
Glass & Tile Bit
Drill Bit Type(s) Included
Masonry Bit
Material Application
Ceramic Tile,Glass
Shank Style
Shank Style
Tools Product Type
Power Tool

Questions & Answers


Can u use this to cut wine bottles?

Asked by Smac July 21, 2016

Thank you for your recent inquiry with The Home Depot. The Home Depot cannot advise any customer of how to use the product purchased or will be purchased. It is to the customer’s discretion of how they use the product. However, any injuries resulting in improper use of product are not the responsibility of the Home Depot. Please be sure to read the instruction manual that comes with your product. For any other questions, please call us at Customer Service 800-430-3376. Thank you for shopping Home Depot.

can this be used for drilling holes on bottom of plant pots? i.e., terracotta

Asked by terracottapots July 9, 2016

Thanks for your question. If the pot is glazed then yes the glass and tile bits would work best. If the pot is not glazed then a masonry drill bit would be recommended, like our HCBG25T.

Best bit to use on travertine tile?? I've heard carbide mason,dimond,etc...

Asked by Djfrench May 31, 2016

Thanks for your question. We would recommend our diamond hole saws. They are designed for drilling into Travertine, Marble, Slate, Granite, Limestone, Porcelain and Ceramic Tile.

I am a jewelry maker and trying to drill through small crystals.

Asked by Tori March 19, 2016

Thank you for your question. The best bit to use would be a diamond bit. We have not tested our glass and tile bits for drilling into crystals. They are designed for drilling into glass and tile.

hammer or regular drill?

Asked by frank July 4, 2014

As a hobbyist and no longer in business, I find a regular drill adequate for 99% of my needs

Can this drill bit be used to drill through porcelin tile?

Asked by Bear February 9, 2014

yes, turn your screw gun on low speed, you can put a piece of masking tape over the place you are going to drill and drill through it. this will help you bit not slide around on the tile when you start. i would get a cup of water and drill a little way though dip the bit in the water to cool it down. drill a bit more, dip it again. it will help the life of the bit.

Can I use this bit with a dremel

Asked by Ilesha August 9, 2013

depends on what dremel you have. you need a chuck. i don't know if the dremel you have has a chuck. personally i would not use this in a dremel, this bit doesn't work super good if you are at high rpm. if you don't have a drill here is a cheap option that you can get if you don't use it all the time. drill is a very useful tool to have. you don't need anything fancy just something that gets the job done.

Customer Reviews

  • 48 Customer Reviews
  • 3.6 out of 5 stars overall
70% of customers recommended.
Overall Ratings
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sweet bit!!
Needed four holes in a tiled shower for a curved curtain rod calling for a 1/4" bit. Picked this bad boy up, marked my holes, and had all four holes drilled out in less than a minute. It was AWESOME. Made the job quick and easy. It does walk a tiny tiny bit so just take the start a little slow. It does make a mess so put some plastic down for a quick clean up. I used a trashbag and that worked for me. Seriously... This bit is the real deal. Super clean holes too.
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Omaha, NE
Couldn't even drill 3 holes
Customer review from logo
I bought this on Monday. The bit went dull before after 2 1/4 holes were drilled. So much for getting my showerhead mounted. Used as directed with 18-V Dewalt, frequent cooling but it obviously was defective or not the quality that they claim.
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Response from Bosch Customer SupportApril 15, 2020
Thank you for the review and feedback. What material were you drilling? The GT300 Glass and Tile Bit can be used with different tile material, however, if it is porcelain or similar material, we recommend using a diamond hole saw. You will need to start at low RPM. We may be able to send out a replacement. Please write back with your name, address and phone number. We hope to hear from you soon, as your satisfaction is important to us. For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST. Thank you for your time.
Cool tool...
Cool tool
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Toronto, ON
Performs ridiculously well!
Customer review from logo
I used this bit to make a few dozen holes in 70 year old tile and every hole looks like it was laser cut! I also needed to drill masonry behind the tile and I just used the same bit instead of changing it. The bit still works great.
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Used for drilling a partial hole in windshield to stop...
Used for drilling a partial hole in windshield to stop crack. Lubricating the drill point with wd-40 type product makes for a clean hole.
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Slow and steady wins the race. Used to drill hole for fan pull chain in ceiling fan light globe ...
Slow and steady wins the race. Used to drill hole for fan pull chain in ceiling fan light globe replacement. Actually needed much larger hole than this but I started with small hole then switched to larger glass bit after smaller hole was complete. Bit works perfectly if you have the patience to drill slowly and always apply consistent pressure (no side-to-side wobbling). To protect against "skittering" of bit across glass when starting, I taped piece of cardboard to surface of glass first - then drilled through both it and glass. Hole came out perfectly round with no chipping...
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They don't last very long if they are not water down after about 30 seconds of use.
They don't last very long if they are not water down after about 30 seconds of use.
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Does not live up to its advertising.
Does not live up to its advertising.
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It worked great and did not chip the tiles.
It worked great and did not chip the tiles.
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5 Star Review
Rating provided by a verified purchaser
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