Drill carbide, abrasive material, glass, marble, masonry, rocks, and concrete. New, improved fluteless design brings more diamonds in contact with your stock. Lasts longer and works better than twist designs. Super duty diamond coating on nickel plated high speed steel.
Sizes: 1/16'', 1/8'', 3/16'', and 1/4''
ships first class for 2.95 plus .95 for each additional item