DeWalt 7/8" x 16" x 21-1/2" 4-Cutter SDS-Max Rotary Hammer Bit DW5816DEWALT 7 8X16X21 1 2 SDS MAX BIT DW5816 Dewalt DW5816 Specifications: 7 8" Diameter 16" Usable Length 21 1 2" Overall Length Dewalt DW5816 Features: ROCK CARBIDE tip maximizes carbide surface contact for longer bit life Longer helix four flute design expedites mill removal for quicker drilling Concave head design allows dust to enter flute chambers quickly increasing bit life Hardened core reduces breakage Fits all brands of SDS Max Rotary Hammers