* HARDENED STEEL * 51T FOR 8MM SHAFT MOTORS
 
8mm Bore
M5 Grub Screws Used with a 2.5 Allen Wrench
Comes With Lock Tight Pre Threaded
Strong and durable Hardened Steel 
Two set-screw holes for extra secure fitting
 
Includes:
1 Pinion
2 Grub Screws