Use Key #800530025 3/16 on both ends. LENGTH : 12INDIAMETER : 0.75IN APPLICABLE MACHINERY : CL-2, CL-3, CL-4, EL-2, EL-3, EL-4, GL-2, GL-3, GL-4, HL-2, HL-3, HL-4, A-2, 40-SFEDGE-SWEET PN : 410540109

1-3/4 X 3/16IN General Key for #410540109 Two keway ends shafting APPLICABLE MACHINERY : CL-3PNEDGE-SWEETS PN : 800530025