Features and Benefits: * Unique 2-in-1 design allows drive adapter to function as both an extension bar and a swivel adapter * Constructed of Chrome Vanadium steel for strength and durability * Knurled aluminum slide sleeve converts adapter between two modes of operation * Swivel feature allows access to hard-to-reach areas * Locking Adapters are backed by a Lifetime Limited warranty 3 Piece set covers 1/4", 3/8" and 1/2" drive applications.