This 4-piece set includes 1/2" Drive (F) to 3/8" Drive (M) reducer, 3/8" Drive (F) to 1/4" Drive (M) reducer, 3/8" Drive (F) to 1/2" Drive (M) adapter, 1/4" Drive (F) to 3/8" Drive (M) adapter, to give you all the sizes you need for transition from socket to socket smoothly. The adapters and reducers are constructed of heavy-duty drop-forged and heat-treated chrome vanadium steel for superior strength and durability to exceed and endure in all work conditions. Bates impact socket adapter and reducer set is perfect for any job that requires a durable, long-lasting tool. The black oxide coating finish provides a super tough finish that will withstand the test of time. This impact socket adapter and reducer set is the perfect solution for any professional or DIY mechanic. The superior design includes a spring-loaded ball detent that keeps your sockets locked into place and secure through holes that also allow the use of locking pins to ensure stability and supreme execution. Bates impact adapter reducer set is perfect for drivers, wrenches, and ratchets to convert size up or down for your automotive needs in the garage. The square drive converter is perfect for making the right connection.