Anti-vibration system: Permanent safety and comfortable work thanks to minimal vibrations and excellent noise reduction. StarlockPlus tool holder: More work progress and higher precision through 100% loss-free power transmission. QuickIN: Tool change in less than 3 seconds thanks to the patented Fein tool-free quick clamping system. With the StarlockPlus tool holder, you have access to around 100 Fein accessories in the Starlock and StarlockPlus performance classes. DC motor: Effective, high-torque motor technology for nearly identical performance to the mains version. Stepless electronic speed control. Metal gearbox: High load capacity and maximum lifespan, as all gearbox components are made of metal. SafetyCell technology: Perfect protection against overload, overheating, and deep discharge thanks to lithium-ion batteries with individual cell monitoring. The battery charge level can be read directly on the battery.