Pololu Universal Aluminum Mounting Hub for 1/4″ (6.35mm) Shaft, M3 Holes (2-Pack) Shipping:1 day You will need to either

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Pololu Universal Aluminum Mounting Hub for 1/4″ (6.35mm) Shaft, M3 Holes (2-Pack) Shipping:1 day You will need to eitherThese universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 1 4 inch (6. 35 mm) diameter motor shafts. The set includes two hubs, four M3 set screws for securing the hubs to motor shafts, and one 1. 5 mm Allen wrench for use with the set screws. Each hub has six threaded mounting holes for M3 screws (not included). 1 4 Pololu universal aluminum mounting hub on a NEMA 23 stepper motor with 1 4 diameter output shaft. These