drill cover for BOSCH hammer advantage: supply complete ... all parts we have supply,Includ: Rotor Sleeve, Positon limited sleeve of spindle, Positon limited sleeve, Spindle sets, Spindle, Piston, Cylinder ... Planting Gear, Washer for rotor sleeve, Cylinder, asway-pled bearing, Mid-axial, Rotor Sleeve,etc...Series Spare Parts.Top ... ,Hitachi,Bosch and other power tools. 20Cr drill cover for BOSCH hammer