Shorty's began making skate parts in the late 80's. Around that time the hardware made was to large for the newer shape of boards and size of the wheels that was up coming. Thus Shorty's began making shorter screws to save the end rider cutting down their hardware. Simply put, Shorty's is OG in hardware for the post 80's generation of skate. Use 7/8 to 1 with no risers, 1 to 1 1/8 with 1/8 risers, 1 1/4 with 1/4 riser and 1 1/2+ for 1/2 risers.