These handles help you grip the arbor wrenches better and also protect your hands and the teeth of the blades. When you loosen the arbor nut a lot of the time it gives way suddenly and then the wrenches fly. This last time one wrench chipped a saw blade tooth. So I designed these grips that bolt on with 2 M6x6mm button head bolts. They fit between the arbor and the blade and do not get in the way. Print with snug support which is easy to remove. Happy Printing!