Features 【Easy to Use】:It is very easy to use,This drive sleeve extension rod sleeve features a 1/2 inch connection,easy to insert, simple to install, and easy to use. 【Material】:It is made of high-quality CRV vanadium steel material, which is very strong and durable, not easy to rust, corrosion-resistant, and can be used for a long time. 【Features】:This tool is a unique extension and flexible enough to be used as a swing extension rod or as a conventional rigid extension rod when offset gaps are required. 【Application】:This drive socket extension barcan be matched with sleeve adapters and universal joint sleeve sets. It is a good helper for garages or repair shops. 【Multiple Sizes】:This drive socket extension rod set features multiple sizes of extension rods that can meet your different usage needs. Specification: Item Type: Drive Socket Extension Bar Set Material: Chrome Vanadium Steel Connector Size: 1/2 Inch Package List: 4 x Extension Bars Package List 4 x Extension Bars