The Makita GA005G XGT 40Vmax BL Grinder has a brushless, maintenance-free and long-life motor and a high speed blade brake for safer working. Additionally the soft start feature provides smooth start-ups. Active Feedback sensing Technology (AFT) stops the engine if the rotation suddenly stops. XPT (Extreme Protection Technology) provides improved dust and water resistance for operation in harsh job site conditions. The battery protection circuit protects against overloading, over-discharging and over-heating.  Specifications: No Load Speed: 8,500/min.Disc Diameter: 125mm.Bore: 22.23mm.Weight: 1.8kg.