These are the replacement screws that mount the 90-degree gearbox to the frame on a standard STACYC 12eDRIVE or 16eDRIVE.What's IncludedOne set of 4 90-degree-gearbox-to-frame screwsFitmentCompatible with: STACYC 12eDRIVE with brushed motor STACYC 12eDRIVE converted to brushless STACYC 16eDRIVE with brushed motor STACYC 16eDRIVE with brushless motor Not compatible with: STACYC 16eDRIVE Elite STACYC 18eDRIVE STACYC 20eDRIVE ImportantSeveral different screw sets are used around the STACYC motor and gearbox assembly.This product is specifically for mounting the 90-degree gearbox to the frame. These are different from: The screws connecting the motor-mount plate to the 90-degree gearbox The screws connecting the reduction gearbox to the 90-degree gearbox Need the Complete Screw Kit?The complete kit includes the gearbox screws along with motor, footrest, sprocket, cover, and chain-guard hardware:H&S Complete Screw Kit for STACYC 12/16