The only impact key on the market with the double knob: turning and drilling bolts and screws with the same tool. Turning and drilling bolts and screws with the same tool: has a hexagonal handle ¼ “at the end of the rotation of the screws and shafts and a quadrangular handle ½” at the end of the rotation of the screws. High torque, high number of impactors and high speed allow faster operation. A durable structure with a solid gearbox, an open engine frame and an element protection system ensures a longer life span.