Bobcat style center DR 5/8P bolt on cutting edge. Through hardened guaranteed against breakage. This is a double beveled cutting edge that is .625" thick, 8" wide, and 68" in length. It takes 7 - .625" grade 9 plow bolts and 7 - .625" nuts. The bolt spacing is center of all holes respectfully 10.500". The space length is 2.500" from the center of the first hole and the center of the last hole to the edge of the cutting edge.