Application: Optimum cleaning of the contact surface on the rim inside. Prevents incorrect wheel bolt tightening torque caused by corrosion. Cleaning the contact surfaces before balancing ensures correct results. Outer diameter up to 160 mm. For wheel centering diameter: at least 51 mm. Maximum rotation speed: 500 rpm. 2-piece set, contents: 1 base component, 1 grinding wheel (160 mm diameter). 11 mm outside hexagon with 3 contact surfaces for attachment to pneumatic, cordless, and corded drilling machines. Centre hole guidance and integrated sander for cleaning the wheel centering. Wear-resistant: around 100 vehicles per wheel. Open-pored abrasive material and cup-formed grinding wheel reduce the formation of dust to a minimum. No formation of sparks. Number of tools: 2.