รุ่น 6905B เครื่องขันน๊อตไฟฟ้า 1/2 Square Drive Impact Wrench (Reversible) 6905B Maximum Torque of 217 ft.lbs. Convenient rocker type switch for one-handed forward or reverse operation. Lightweight (6.0 lbs.) for reduced operator fatigue during extended use. Powerful (4 AMP) motor for superior performance under heavy duty applications. Well balanced for easy handling in confined work areas. Metal gear housing for increased durability. All ball bearing construction for long tool life. Precision machined gears for long production usage. Externally accessible brushes for easy inspection and replacement Double insulated