TEKTON impact extensions and adapters allow you to expand your range. An adapter or reducer can help compensate for lost or broken sockets, fill in gaps for incomplete size ranges, and expand the range of your socket system. This set includes 1/4, 3/8, 1/2, and 3/4 in. drive impact adapters and 3/8, 1/2, and 3/4 in. drive impact reducers. The 1/4, 3/8, and 1/2 in. drive accessories have a spring-loaded ball detent that lightly secures the socket by engaging its through hole. The 3/4 in. drive accessories have a spring-loaded pin detent that locks into the through hole on a socket, offering a secure connection. All items work with through-hole, friction ring, and detent pin anvils. The ring groove supports use with retaining rings, the smooth walls support use with friction rings, and the through hole supports use with retaining pins. All of our 3/4 in. drive sockets, extensions, adapters, and reducers are made out of 4140 steel and have a corrosion-resistant manganese phosphate coating.