Attributes . 100 Chain; 19 Teeth; 2 Rows of Teeth; Hardened Teeth; 8.241" Outside Dia; 7.595" Pitch Dia; A-Double Single; Rough Bore Mount; 1-1/4" Chain Pitch; ANSI Roller Chain Chain Type; No Keyway; Steel Material; 4-3/16" Max Bore . Names