No load maximum speed of 4000r/min(frequency 2500r/min) for driving large fasteners quickly and easily. Wrench Chuck :1/2". 1 Impact wrench. 1 Screwdriver head. Drill Chuck : 0.8-13mm / 3/8". ????Forward / Reverse Button: enables easily change rotating direction,can be used for tightening or loosening nuts and bolts.
