Absolute and complete bullshit. I put 1 of them on and immediately took them off again. The thread was so screwed up that I couldn't even get 2 tabs out of 6. Only about 3 tabs went through without any problems. The rest are all undressed and picked up on them because of the twisted bobby pins. My now mangled butt flaps are probably twisting my butt studs. I wouldn't trust them with a lawn mower, let alone a moving vehicle on the road.