Brushless powerful movement, high temperature copper enameled wire, anti-overload, anti-burning machine. Thickened cover shield to place spark splash damage. Enhanced side handle, more stable hands control. Two gear speed,one second quick change. Ergonomic design, slim soft body, better fit the palm of your hand, work be more convenient. Motor type: brushless motor Voltage: 21V Speed: 8500rpm Adjustable gear: 3 gears Battery model: suitable for 18V battery(not included) plate size: M14 Installation Guide: Saw blade installation(not included): 1. the spindle lock button and screw the upper tab out with a wrench. 2. Place the saw blade monkey into the upper tablet. 3. Tighten the upper tab with a wrench. Color: As Shown Material: Metal+Plastic Package Contents: 1 x angle grinder 1 x wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.