Used with sledge or dead blow hammer. Often called "Rough Neck Pattern". Roughneck "Hammer Wrench". Made of Forged alloy steel. Black industrial finish. Made in U.S.A. Standard, straight pattern. 6 Points offers. 2" Wrench opening. Head measures 3-1/32" diameter by 1-7/32" thick, 11-11/16" overall length.