I've successfully used the Shimano SH-M51 cleat on Wellgo made pedals that were Shimano PD-M737/M747 knockoffs. These should also work with any pedal that are clones of the Shimano PD-M5xx series pedals. Beyond, that I can't really tell you as cleat and pedal designs vary. My knockoff pedals were produced by Wellgo for K2 and were high-end for the time. They had magnesium bodies, Shimano-like guts and titanium spindles. I also had another set of Wellgo pedals that took the Wellgo M7 cleats. They supposedly were not compatible with Shimano cleats. I have never tried to use the Shimano cleats with them.