The Makita 18V Brushless Slide Switch Angle Grinder has a variable speed function that allows users to select the optimum speed for the accessory and the application and is designed to suit the needs of fabricators, engineers, welders and stonemasons. - Automatic torque drive – automatically adjusts speed and torque during operation for optimum performance - Soft start – slowly increases speed to full rpm for safe and smooth operation - Anti-kickback – turns the motor off if the rotation of the wheel is suddenly forced to stop preventing the tool from kicking backwards - Anti-restart – the tool will not start if the switch is engaged when a battery is installed. The switch must first return to the off position - Variable speed – dial allows the rpm of the grinder to be controlled at a range between 3,000 and 8,500rpm - XPT e - Xtreme Protection Technology – for use in outdoor applications or harsh environments, protection from dust and moisture is enhanced - BL Brushless Motor – efficient energy production enabling lower heat production and increased work on a single charge - Wheel diameter: 125mm (5)No load speed: 3,000 - 8,500rpm - Overall length: 382mm - Skin weight: 2.5kg - Weight (with battery): 3.1kg - Voltage: 18V