Specifications • Battery Voltage: 40v • Battery Type: Makita XGT Lithium Ion • Max Wheel Diameter: 115 mm • Bore Diameter: 22.23 mm • Max Wheel Thickness: 7.2 mm • No Load Speed: 8,500 rpm • Noise sound pressure: 81 dB(A) • Noise sound power: 92 dB(A) • Noise K factor: 3 dB(A) • Vibration K factor: 1.5 m/sec2 • Vibration (Surface Grinding): 5.5 m/sec2 • Net weight: 2.9 – 3.6 kg