IR 301-32MK Angle Air Die Grinder Kit Surface Conditioning Kit Pads and Disks. Ingersoll-Rand has packed IR301 in a strong, blowmolded plastic case along with two course and two medium grit 3" 3M RolocTM surface conditioning pads, two coarse, two medium grit 2" 3M RolocTM surface conditioning pads and a disc holder. The case can also accommodate: * 2" RolocTM surface conditioning discs. * 2" disc holder in place of three-inch discs. 1 year warranty.