Features: Material: 45 steel Overall size: 260x105x98mm Shaft head size: diameter 25mm 50mm Center height: 49 mm maximum. Power: 1.5kw 2HP Used up: 0.01mm Towbar spindle hole: 12mm (not included) Spindle material: 20CrmnTi, carburizing heat treatment Bearing type: 6000 rpm milling waterproof The package includes: 1X spindle unit.