Makita GA5021 125mm / 5\" Angle Grinder Complete with Side Handle, Lock Nut Wrench & Wheel Guard The Makita GA5021 features a large type switch trigger and Super Joint System (SJS). Makita SJS Grinders include an innovative mechanical clutch system which allows the drive shaft to slip if the wheel catches or binds. It has been engineered to protect the gears and motor thus vastly extending the operational life of the tool. FEATURES High dust proof construction with protection of motor Soft start Large trigger Double insulated SJS - protection of gears ensures longer lifetime SPECIFICATION Max Wheel Diameter: 125 mm Bore Diameter: 22 mm Spindle Size: M14 x 2mm Input Wattage: 1050 w No Load Speed: 11000 rpm Net Weight: 2.5 kg NOISE & VIBRATION Noise Sound Pressure: 90 dB(A) Noise Sound Power: 101 dB(A) Noise K Factor: 3 dB(A) Vibration K Factor: 1.5 m/sec² Vibration: Artificial Wheel: 13.5 m/sec²