As with any tool, length matters. With these irons together (try gently putting the black and silver irons together to break the bead) with plenty of lube, I was able to change my motorcycle tires easily. Even as a beginner for the first time. If you have the guts, these irons work just fine. Use rim protector (I used cut pieces of a plastic jug) and soapy water, watch a video and head into town. If you break one of these irons, you've done something wrong.