Lets you get to places you couldn't before. The BikeMaster Wobble Extension Bars allows sockets to be driven at up to 15° off vertical. Available in 1/4" or 3/8" Made of hardened chrome and polished steel 4-piece sets 1/4" set contains: 50mm, 100mm, 150mm and 250mm long 3/8" set contains: 45mm, 75mm, 150mm and 250mm long Manufacturer's lifetime warranty