Diamond Rotary Bit Set, 4-Piece J72947

Drill right through carbide, abrasive material, glass, marble, masonry, rocks and concrete with these long-lasting diamond coated rotary drill bits. The nickel-plated steel construction provides excellent results on almost any surface, even semi-precious stones. The new and improved flute-less design brings more diamonds in contact with your stock for added precision.

• Drill carbide, abrasive material, glass, marble, masonry, rocks, concrete and more
• Fluteless design brings more diamonds in contact with your work surface
• Lasts longer and works better than twist design for rotary tools