About this item [PACKAGE INCLUDED]: 5/8in x 12in, 3/4in x 12in, 7/8in x 12in, 1in x 12in. A variety of sizes to meet your different needs. [INDUSTRIAL MATERIALS]: 40Cr carbon steel, YG8C carbide tip, sturdy and carbon steel with heat treatment improves core strength for maximum durability and extended life. [HIGH PRECISION] The SDS hammer drill bits feature 2-flute self-centering carbide tip ensuring fast cut speeds and accurate holes [MULTI PURPOSE]:This set is perfect for working on masonry applications, brick, stone, concrete, block, stucco, etc. [EASY TO USE]: The SDS PLUS shank is suitable for most rotary hammer drills and meets most of your needs. SDS chisel matches the electric hammer drill , such as Hilti, Milwaukee, Makita, Dewalt drills and other SDS/SDS Plus Hammer drills, etc.