The Bosch GWX 18V-15 P Professional BITURBO Angle Grinder offers faster cutting and more metal removal than previous cordless grinders due to BITURBO Brushless technology.The PROtection switch, super-fast X-Brake, and KickBack Control provide increased user protection. Uses keyless X-LOCK system for quick, easy, and convenient accessory changes. Comes as a Bare Unit, NO battery or charger. Compatible with all Bosch Professional 18V batteries, including ProCORE18V batteries and chargers (Professional 18V System) Also compatible with AMPShare, the multi-brand battery alliance. Specifications: No Load Speed: 9, 800/min. Disc Diameter: 125mm.