The DEWALT DCG409 XR Advantage Grinder has a brushless motor provides increased run time and durability. An electronic soft start allows for a more controlled start-up. Protective mesh dust guards offer additional protection by protecting against motor contamination, increasing tool durability.FlexVolt ADVANTAGE technology. This unique electronic module features pack identification technology. This enables the tool to recognise when an XR FLEXVOLT battery is attached and unlock even more power.Its electronic brake and clutch work quickly to keep you safe. The rubber overmoulded rear and side handles increase user comfort and control. Supplied as standard: 1 x 2-Position Side Handle.1 x Keyless Protective Guard.1 x Hex Key.1 x Inner Disc Flange.1 x Outer Disc Flange. Specification: No Load Speed: 9,000/min.Max. Disc Diameter: 125mm.Spindle Thread: M14.Weight: 1.8kg (without battery).