The HiKOKI WH12DDJHZ is part of the all-new Peak battery platform  This impact driver has a high power brushless motor and can generate 135Nm of hard torque. With this product being compact in size at only 134mm it is great for getting into those tight, hard to reach spaces. Features: High power brushless motor 135Nm hard torque Three tightening modes - soft/power/self-drilling screw All new 4.0Ah Li-Ion battery with 4 stage charge indicator Compact design - only 134mm long Electric brake LED worklight Soft grip handle Forward & reverse switch Comes with: 2 x BSL1240M 4.0Ah Li-Ion batteries UC12SL Charger Specification: Bit holder: 6.35mm (1/2\") hex Drilling Capacity: Screw: M4-M8 Bolt: M5-M15 HT bolt: M5-M12 Self-drilling screw: 3.5-5mm dia. No-load Speed: Soft mode: 0-1300/min Power mode: 0-3200/min Self-drilling screw mode: 0-3200/min Impact Rate: Soft mode: 0-2500/min Power mode: 0-4000/min Self-drilling screw mode: 0-4000/min Max Torque: 135Nm Length: 134mm Weight (inc BSL1240M): 1.1kg