ARTU 7-Piece Cobalt & Tungstel Multi-Purpose Drill Bit Set, 1/8 In. thru 5/16 In. Gorilla Also ideal for abrasive materials

Also ideal for abrasive materials like brick

ultra-smooth finish

Ideal for the woodworker or punchlist contractor

Patent-pending unique handle to blade design

ARTU 7-Piece Cobalt & Tungstel Multi-Purpose Drill Bit Set, 1/8 In. thru 5/16 In. Gorilla Also ideal for abrasive materialsDesigned for rotary or percussion drilling. Drills through hardened steel, ceramic tile, marble, plastic, cast metal, concrete, glass, plexiglass, granite, fiberglass, brick, masonry, PVC (polyvinyl chloride) and wood. Negative back grinding enables tip to bore through materials with a filing action. Cobalt and tungsten carbide drill bit tip designed for maximum hardness, wear and resistance to heat up to 2000 F (Degree Fahrenheit). Resharpenable.