Irwin POWER-GRIP 50532 Masonry Drill Bit, 1/2 in Dia, Straight Shank tools--07-20-26 Ball-bearing action

Ball-bearing action

Dual tooth design features a double tooth configuration with small gullets for faster material removal and extra durability

Create a weather-resistant look that lasts and lasts

The screw pilot bits provide adjustable countersink depth with an Allen wrench

Irwin POWER-GRIP 50532 Masonry Drill Bit, 1/2 in Dia, Straight Shank tools--07-20-26 Ball-bearing actionCarbide tipped for long life with spear pointed tip that reduces breakouts when drilling from one side. Provides smooth, accurate drilling in applications such as ceramic tile, mirrors, glass, marble tile, vitrolite, china drilling fastener holes in bathroom tile or for wall mirror.