Weiler® Drive Mandrel, Drive Mandrel Item, 1/4" Arbor Hole, For Use With: Mount On Tools With 1/4 Collets, Norton Speed-Lok® T Back-Up Pads And Weiler Metal Hub Pad #60509, For Mounting 2" & 3" Bobcats On Tools With 1/4" Collets, Material: Steel, 2 to 3" Stem Diameter