would have to say I do not recommend these cranks, hadn't even got to use them yet but was swapping them between frames I'm building and the extraction bolt completely stripped, I use park tools hex keys so quality tools isnt an issue, hadnt used much torque either. Ended up having to cut through the non drive side axle to get them off, completely destroyed. metal in both the axle and tightening/extraction bolt seems way too soft for the torque needed for a crankset.