DEWALT DW5853 1-1/8" x 24" x 29" High Impact 4 Cutter SDS Max is designed with a high impact tip which maximizes carbide surface contact for longer bit life. The open head design channels dust into flutes for quicker drilling. It also features a longer helix four flute design that expedites mill removal for quicker drilling. Designed for use with all brands of SDS Max rotary hammers, and commonly sued for drilling holes in poured concrete and other masonry up to 2" diameter. Specifications: Diameter of 1-1/8", Usable length of 24", and Overall length of 29".