Roller Chain Breaker No.60-100 For disassembling rivet-type roller chain instead of using a hammer and punch. Adapted for the following pitch: 1/4'', 3/8'', 5/8'', and 3/4'' from No.25 to No.100. Quality made tool with jaws milled from bar stock. Replaceable punch point is tempered ste el for long life. Black oxide and zinc plated.