Socket Extension Set - Milwaukee 3pc 3/8” Drive Locking Extension Set, 48-22-9361Item #: 48 22 9361 The 3PC 3 8" Drive Locking Extension Set offers the most control and is more secure in tight applications. These 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. In addition to keeping the socket secure with a durable knurled locking collar, these extensions feature a detent hole to increase engagement with