Feature:* Made of high quality chrome vanadium steel material, durable and rust-proof.* Easy to install, which is convenient to use.* Can be used as a wobble extension bar when shifting clearance is needed or use as a regular rigid bar extensions.* Can be used with 1/4" (6.35mm) sleeve which can be used with extension bar, bar, small square bar, etc. Specification:* Material: Chrome Vanadium Steel* Craft Surface: polished chrome* Color: silver(as pictures show)* Drive head size: 1/4* Size(approx):L rod: 150mm(6"), 63gM rod: 100mm(4"), 41g S rod: 50mm(2" "), 23g* Quantity: 1 pc Package content: 1x extension bar Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.