This is a genuine manufacturer-sourced part which is specially designed for use with Craftsman radial saws. The collar attaches to the motor shaft to hold the cutting blade in place. A wrench will be needed to remove the nut in order to get access to the blade to replace it. This part is made of stainless steel and is sold individually.
This is an authentic Craftsman replacement part, sourced from the original manufacturer for use with yard vacuums. The special brush connects to the brush retainer bracket and is used to sweep yard debris into the hopper bag. This item is available as an individual replacement part.