kwb 109146 Glass Drill Bit Set, 6 Pieces, 5/6/8 mm, Tungsten Carbide, for Glass, Tile, Ceramic, Mirror, Porcelain

This 6-piece glass drill bit set from kwb is specifically engineered for clean, chip-free drilling in glass, tiles, ceramics, mirrors, and porcelain. Unlike standard twist drills, each bit features a tungsten carbide spear-point tip that starts precisely without wandering and cuts without impact, making it ideal for both DIY and professional use. The set includes two bits each in 5 mm, 6 mm, and 8 mm diameters, covering common fastener sizes for bathroom and kitchen installations.

Highlights

• 6-piece set: 2x 5 mm, 2x 6 mm, 2x 8 mm
• Tungsten carbide spear-point tip for precise starting
• Cylindrical shank fits quick-release and geared drill chucks
• For glass, tiles, ceramics, mirrors, porcelain
• Wet drilling recommended for longer life and cleaner holes
• Supplied in a practical storage case

In daily use

Use these bits with a standard corded or cordless drill in rotary mode only—never hammer. Apply light pressure and keep the tip wet with water or a suitable coolant to prevent overheating and glass cracking. The spear-point design bites into the surface without skating, and the tungsten carbide edge maintains sharpness through repeated use. Ideal for mounting towel bars, shower doors, mirrors, and tile backsplashes.

Full specifications

• Product type: Glass drill bit set
• Number of pieces: 6
• Drill bit diameters: 5 mm, 6 mm, 8 mm (2 each)
• Tip material: Tungsten carbide
• Shank type: Cylindrical
• Chuck compatibility: Quick-release drill chucks, geared drill chucks
• Recommended applications: Glass, tiles, ceramics, mirrors, porcelain
• Drilling method: Rotary (non-impact)
• Cooling requirement: Wet drilling recommended
• Packaging: Storage case

Final note

For best results, drill at low speed with constant water cooling and reduce pressure as the bit breaks through to avoid chipping the exit side.