Allows you to use any type of cutoff wheel with your 1/4" collet die grinder. The complete arbor set includes the shank and two screw mandrels for 1/4" and 3/8" hole sizes. Supports cut-off wheels up to 4" diameter. Note: Always use an approved face shield when using a die grinder with any type of cut-off wheels. For use with ATS8502. 1 lbs (0.5Kg) shipping weight.