These drill bits are designed for use in air hammers for concrete and more extreme surfaces. Constructed of heavy duty, heat treated carbon steel, they make a fine addition to any workshop. These bits are designed for use in air hammers and air drills when working on concrete and other extreme surfaces. Constructed of heavy duty, heat treated carbon steel, they make a fine addition to any workshop. Click on Overstock.com for hot deals on tools for every job. Set includes: 10-inch curve SDS chisel (1 inch diameter) 10-inch pointed SDS chisel (1/2 inch diameter) 10-inch flat SDS chisel (3/4-inch diameter) 18-inch SDS drill (51/64 inch diameter) 12-inch SDS drill (23/32 inch diameter) Two 8-inch SDS drill (5/8 inch diameter & 9/16 inch diameter) Three 6-inch SDS drill (Two 13/32 in. dia. & One 5/16 in. dia.) Two 4-inch SDS drill (1/4 in. and 13/64 in. diameter) From Overstock.com for $49.99 $29.99
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