ITEM NAME:Black Stainless Steel Deburring External Chamfer Tool Bit Remove Burr 8-32 Bo â„–[.1 x Deburring External Chamfer Tool. Simple operation, using the lowest speed on the drill bit, and then slightly applying pressure to remove the burr. Stey: Hex shank. Effective on Stainless Steel, Hardened Steel, Mild Steel, Copper, Brass, Aluminum, Fiberglass, Wood, Plastic.