100BS08H X 1 Sprocket - 1 1/4" Pitch - 08 Teeth - 1" Finished Bore Includes Keyway & 2 Set Screws Hardened Teeth. Has recessed groove in hub for chain...100BS08H X 1 Sprocket - 1 1/4" Pitch - 08 Teeth - 1" Finished Bore Includes Keyway & 2 Set Screws Hardened Teeth. Has recessed groove in hub for chain...