Our 4PC 3/8" Drive Wobble Extension Set offers the most control and better access in even the tightest spaces. The extensions feature the largest knurling surface on both the shaft and female drive end allowing precision control when hand-tightening fasteners or working with oily materials. The set includes a durable compact storage rack designed to optimize drawer space for long-term use. 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.