Tungsten steel shaft, high hardness and wear resistance. Good workmanship and good performance. Specifications: Square drive: 1/2 inch Torque range: 0-520 nm Voltage: 18V Input power: 1280w Battery capacity: 13000 mAh x 1 Screw diameter: 22 The maximum size of the hand fixing screw: 0-28mm Idle speed: 0-3200 rpm Beat frequency: 0-4000 ipm Maximum torque: 520 Nm Angle Grinder Properties: A versatile electric angle grinder with high performance, high efficiency, safety and stability. Tungsten steel shaft with high hardness and high wear resistance for durability.The cordless angle grinder eliminates cable clutter and you can start work anytime, anywhere. This buffing machine is adjustable for different work needs and can meet the different needs of woodworking electricians. Specification: Item type: Battery-powered portable brushless heavy duty polishing machine with rechargeable angle Series: Makita Series Spindle: 10mm Model: Type 125 angle grinder Working voltage: 18V Speed: 20000 rpm Power: 750w Color: blue + black Type: Rechargeable Supply voltage: 220V. If item is defective after 3 months, you can still send it back to us.