Features: Part of the Draper Storm Force® ; 20V Power Interchange series, rear hand grip, auxiliary side handle, grinding guard, spindle lock button, locking flange. Batteries and chargers are available separately. Draper Storm Force® ; 20V interchangeable battery system allows you to combine one battery with any of the tools within the 20V Storm Force series (not compatible with Draper Storm Force® ; 10.8V). Battery: 20V Storm Force Li-ion, No Load Speed: 0-10,000rpm, Spindle thread: M14, Disc Diameter: 115mm, Bore: 7/8"/22.2mm, Batteries Per Item: Sold separately, Charger Type: Sold separately, Supplied in Case: No, Weight: 1.7kg