The MILWAUKEE® 3/8" Drive Wobble Extensions offer the most control and better access even in the tightest applications. The extensions feature the largest knurling surface on both the shaft and female drive end allowing precision control when hand-tightening or working with oily materials. The male square end features a wobble design, providing up to 15 degrees of movement for better access at different angles and in tight spaces. The male end also provides added versatility by doubling as a standard or a wobble extension. The chrome plating on the extensions offers corrosion and rust protection. All Milwaukee® Mechanics Hand Tools are backed by a lifetime guarantee.