Mandrel Holders is designed for use with the 3″ x 3/8″ radial bristle discs. It allows stacking of one to four discs depending on the width of the surface to be cleaned. It feature includes 1-3/4″ x 1/4″ mandrel shank size and 3/8″ center hole. It works like a turret. It holds a wide range of bezel, forming and ring mandrels. It can be attached to the top of your bench or to the side to hold a mandrel straight up. It rotates and locks in any position with the turn of a single wing nut. It includes mounting hardware and constructed by aluminum.