Tungsten carbide tipped arrowhead drill bit for accurate drilling through ceramic tiles and glass. Cross-ground spear tip reduces breakout and chipping. Suitable for rotary drills only at low speed. Available in sizes 4mm to 10mm.
Size
Price
QTY
4mm
£1.20£1.44
5mm
£1.24£1.49
6mm
£1.35£1.62
7mm
£1.39£1.67
8mm
£1.49£1.79
10mm
£1.98£2.38
The TCT Arrowhead Tile and Glass Drill Bit is designed for clean, accurate drilling through ceramic tiles, porcelain, and glass. The cross-ground, spear-shaped tungsten carbide tip acts as a glass drill bit and tile bit in one, cutting through hard, brittle surfaces where a standard masonry or wood bit would simply skate across the surface or cause cracking. The shot blast finish on the shank helps with grip and reduces slippage in the chuck.
Tile and glass are unforgiving materials. The moment you rush the job or use the wrong bit, you end up with a cracked tile or a shattered pane. This bit is built around that specific problem. The arrowhead geometry scribes the surface as it cuts, which keeps the entry point clean and reduces the chipping and star cracking that makes a tiler’s heart sink. Used correctly at low RPM in rotary mode, it gives you a precise, controlled hole every time.
Where to Use a TCT Tile and Glass Drill Bit
These bits are used wherever holes need to go through ceramic or glass without breaking the surrounding material. That includes wall tiles in bathrooms and kitchens, worktop splashbacks, glazed ceramic floor tiles, mirror glass, and standard float glass. Plumbers and electricians working in tiled areas reach for these when they need to bring a pipe or cable through a finished tiled wall without starting a remedial tiling job. Bathroom fitters use them for fitting fixtures and accessories to tiled walls, and glaziers use them when drilling through glass panels for fittings and fixings.
The arrowhead tip design works equally well on unglazed and glazed ceramics, and the range of available sizes from 4mm to 10mm covers most standard fixing and pipe requirements without needing a specialist order.
Drilling Glass with This Bit
Glass requires a little more care than tile. When drilling through glass, always use a lubricant. Water is the most practical option on site and works well for keeping the tip cool and reducing friction. Overheating is the main cause of glass cracking mid-drill, and keeping things cool extends the life of the bit considerably. A simple ring of plumber’s putty filled with water around the drill point works well as a makeshift coolant reservoir if you are drilling flat glass without a drill stand. Keep the pressure light and consistent, and let the bit do the work rather than forcing it through.
The TCT glass drill bit is available individually across sizes from 4mm to 10mm, making it straightforward to pick the exact size for the job rather than buying a full set you may not need. At this price point, it also makes sense to keep a few spares on the van because tungsten carbide tips can chip if the drill is dropped or if the bit is used at the wrong speed on very hard porcelain.
Pro Tip: When starting a hole in glass or a glazed tile, apply light pressure and let the tip scribe a small circle before increasing speed slightly, as this prevents the bit skating across the surface and dramatically reduces the chance of cracking.
TCT arrowhead tile and glass drill bits are used for drilling fixing holes through ceramic wall tiles, porcelain floor tiles, glazed splashbacks, mirror glass, and float glass panels. Bathroom fitters, plumbers, tilers, and electricians all use these bits regularly when working in finished tiled rooms. They are the standard choice for creating clean, chip-free holes for pipe penetrations, socket back boxes, bathroom accessories, and glass fittings where a standard drill bit simply will not do the job cleanly.
Best For
Ceramic wall tiles
Porcelain floor tiles
Glazed splashbacks
Mirror glass
Float glass panels
Bathroom and kitchen tile fixings
Works With
Standard rotary drills
Corded and cordless drills in rotary mode only
Standard round-shank chucks
Key Features
Cross-ground spear-shaped TCT tip
Shot blast finish shank
Rotary mode only
Low RPM operation
Sizes from 4mm to 10mm
Suitable for tile and glass
Not suitable for: Not suitable for use in hammer or percussion mode as this will shatter the tile or glass immediately. Not recommended for stone, brick, concrete, or metal.
Fit the bit securely into a standard rotary drill chuck and ensure the drill is set to rotary mode only with no hammer or percussion action engaged. Select a low speed setting before starting. Apply light, steady pressure at the drill point and keep the tip cool with water when drilling glass. Do not force the bit through the material.
For glass drilling, create a small water reservoir around the drill point using plumber's putty or masking tape to keep the tip lubricated throughout the cut. Once the tip has scribed a visible ring and the hole is started, maintain consistent pressure without rushing. Forcing the pace is the most common cause of cracking on both tile and glass.
Set the drill to rotary mode only and disengage any hammer or percussion function.
Select a low RPM speed setting on the drill before making contact with the surface.
Mark the drill point clearly on the tile or glass using a marker or masking tape to prevent the bit skating.
For glass, build a small putty or tape dam around the drill point and fill with water as a coolant.
Apply light, steady downward pressure and begin drilling at the lowest speed.
Maintain consistent pressure throughout, letting the tungsten carbide tip cut at its own pace.
Keep water lubrication topped up when drilling glass to prevent heat build-up.
Once through the surface, withdraw the bit steadily to avoid chipping the exit point.
Can I use this bit in a hammer drill?
No. This bit must be used in rotary mode only. Using hammer or percussion action will crack or shatter tiles and glass instantly. Always check that percussion is switched off before drilling.
Do I need water when drilling tiles as well as glass?
Water is strongly recommended for glass to prevent heat build-up and cracking. For ceramic tiles it is less critical but still helps extend the life of the bit, particularly on harder porcelain tiles where heat builds up more quickly.
Which size should I use for standard wall plug fixings in tiles?
For most standard wall plugs and screws used in bathroom fittings and accessories, a 6mm bit is the most common choice. For heavier fixings requiring a larger plug, a 7mm or 8mm bit is appropriate. Always match the bit size to the plug size specified by the fixing manufacturer.
The bit body is manufactured with a tungsten carbide tip ground to a cross-point spear profile, which creates a scribing action on hard, brittle surfaces rather than a percussive cutting action. The shot blast finish on the shank provides a slightly textured surface for improved chuck grip. The bit is designed for use in standard rotary mode at low RPM and is not rated for hammer or SDS drilling applications.
Tip Material
Tungsten Carbide (TCT)
Tip Geometry
Cross-ground spear / arrowhead
Shank Finish
Shot blast
Available Sizes
4mm, 5mm, 6mm, 7mm, 8mm, 10mm
Drill Mode
Rotary only
Recommended Speed
Low RPM
Recommended Lubricant
Water (for glass)
Size
10mm, 4mm, 5mm, 6mm, 7mm, 8mm
Box Quantity
set
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