For disassembling rivet-type roller chain instead of using a hammer and punch. Adapted for the following pitch: 1/4 -inch , 3/8 -inch , 5/8 -inch , and 3/4 -inch from No.25 to No.100. Quality made tool with jaws milled from bar stock. Replaceable punch point is tempered steel for long life. Black oxide and zinc plated.