5/8" x 4" x 6", Hammer, Drill Bit, Reduced Slipping, 3 Flat Secure Bit Shank Holds The Bit Firmly In The Chuck, Comprehensive Offering With Diameters From 1/8" To 1" With Lengths Up To 18", Faster Drilling Reinforced Flute Geometry Increases Bit Stability, Longer Life Carbide Tips Extend Performance In Masonry Applications.