The REDLINK PLUS™ intelligence system delivers an advanced digital overload protection for tool and battery and uniquely enhances the tool performance under load. AUTOSTOP™ lift-off detection: Detects excess rotation and automatically cuts power to the drill for best user protection. Self-powered permanent magnet with 8,890 N of holding force prevents accidental magnet deactivation for improved user protection and easy alignment. 2 speed gear box for optimized drilling speed with 400 and 690 rpm's when using annual cutters or twist drill bits. The brushless POWERSTATE™ motor provides corded drilling performance with the strongest magnet holding force on ΒΌ" steel and 40 x 18 mm holes per battery charge.