General description Sealey Premier Impact Extension Bar Set 1/2" Square Drive includes four drop-forged Chrome Vanadium steel extension bars, designed for use with all types of impact tools. The set features a phosphate finish for enhanced corrosion resistance and a spring-ball socket retainer. It is supplied in a convenient storage tray, making it ideal for both professional and DIY use. Technical specifications Material: Drop-forged Chrome Vanadium steel Drive: 1/2" Square Drive Lengths: 75mm, 125mm, 150mm, 250mm Supplied in storage tray Model No.: AK5513 EAN: 5051747447561 Other information Lifetime warranty included Part of a comprehensive range of Premier Hand Tools