General description A set of 3 extension bars with spring-loaded universal joints designed for easy attachment to sockets, providing access to fasteners in hard-to-reach areas. Technical specifications Extension lengths: 102mm, 152mm, and 254mm Drive size: 1/4''D Material: Chrome vanadium with a polished finish Usage Ideal for difficult access fasteners, such as those found in engine bays and under dashboards Spring-loaded design helps maintain joint integrity over time Other information A 3/8''D set is also available (Part No. 8494)