Features: Engineered with torsional limiting technology and a universally 1/2inch square drive, the extension rod Set ensures precise torques control, preventing over tightening and tool damage for automotive and mechanical applications. This robust set offer 40% high strength than standard steel, featuring color coded rod for quick identification and a nonslip grip handle that enhances control in oily or confined workspaces. Designed for professional mechanics, industrial maintenance crews, and DIYer enthusiasts, these extension rod withstand high torques impacts wrench use while remaining lightweight enough (500g) for mobile repair set or home garage toolboxes. Tackle stubborn bolts on car engines, motorcycle frames, or heavy machinery with confidence, the 30cm extensions provide optimal reach in tight spaces like wheel wells, engine bays, and industrial equipment compartments. The color coded torsional rod simplify torques selection for various fasteners, while the compact storage friendly design makes it an essential upgrade for any workshop tackling cars, heavy machinery, or precise assembly tasks. Specifications: Component: alloy Length:Approx.20cm/7.87inch Properties: 5-piece set/10-piece set Package Includes: 5pcs/10pcs Socket Extension Rods note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.