Review on Superior Grade Shear Rotary Cutters with Nylock Technology by German Diaz

I insist on nylon locknuts that allow vibration to safely loosen the normal tight nuts found on rotary mowers. I also add a 1/2" flat washer for each end but that's just me. The convenience of a 5 pack set coupled with Revain's quick and easy shipping was a no-brainer for me. Thank you.