Offer is for a 3 piece hard to find diameter shank. (.678 diameter x 2-1/4" long round shank). This shank size fits the larger and more industrial air tools. If you have one of these industrial air tools don't hesitate to buy this 3 piece deal. Comes with one 7/8" wide chisel, 1/4" diamond point, and a 3/4" hex point chisel. They are all about 8-1/2" overall length. The diamond point and chisel are manufactured by Delsteel and the hex point is made by Bedco Alloy. They are all top USA companies. Economically priced. Limited Supply!!!Desteel / Bedco Alloy