Premium Material: Twist drill bit set made of hard and durable alloy material, easy to install and use, wide application range, has a long service life.
Unique design: U-shaped groove design, fast removal of drill cuttings, anti-skid triangle handle, so that the drill bit remains tight and stable in the power drill.
5 Pcs drill bit set with 4 different sizes: 2 × 6mm(1/4"), 1 × 8mm(5/16"), 1 × 10mm(3/8"), 1 × 12mm(1/2")
Widely Usage: The sturdy tungsten carbide blade designed with a spear tip can easily penetrate various materials such as ceramic tiles, concrete, brick, glass, plastic and wood, and reduce cracking.

Kindly Warning: When drilling hard material such as glass, porcelain floor tile, marble or granite, please use water for lubrication.