The Ko-ken USA 1/4", 3/8", and 1/2" Square Drive Wobble-Fix Extension Bar Set offers versatility and precision for any professional or DIY mechanic. Housed in durable cross-linked closed-cell polyethylene foam, this set is resistant to oil, liquids, and debris, ensuring longevity and easy organization. The Wobble-Fix feature provides two secure solutions: the "Fix" option holds the socket firmly in place with zero movement, perfect for tasks requiring stability, while the "Wobble" option allows a flexible movement of up to a 15-degree angle, ideal for accessing hard-to-reach areas. This extension bar set is a must-have for anyone seeking reliability and adaptability in their tool collection.