Brand: DENX Model: DX3311 Voltage: 12 Volts Power: 550 Watts Motor Type: Brushless Motor Battery: 3C1300 No-load Speed: 18,500 RPM Center Hole Diameter (Spindle): 10 mm Disc Diameter (Grinding/Cutting): 78 mm Spindle Thread: M5 Design Features: Balanced and lightweight design for one-finger or one-hand operation. Quick stop switch Protective and safety cover Accessories and Contents: 2 x Cutting and Sawing Blades/Discs. Small wrench. Rechargeable batteries.