General description A set of 1""D impact extension bars designed to provide access to difficult-to-reach fixings. Suitable for use with an air impact wrench, this set is ideal for commercial vehicle maintenance and other heavy-duty applications. Technical specifications Set includes 3 impact quality 1""D extension bars Lengths: 100mm, 150mm, and 300mm Manufactured from chrome molybdenum Black phosphate finish Drilled head to accept retaining pin or detent ball Spring-ball socket retainer