1/2'' Drive Sockets: 1/2'' drive sockets are used in ratchets and wrenches to tighten or loosen fasteners such as bolts and screws. They come in a range of standard sizes, such as 1/4, 3/8, 5/16, 7/16, 11/32, 9/16 and 5/8 inch and larger
1/2'' Drive Ratchets: 1/2'' drive ratchets are used in combination with sockets to tighten or loosen fasteners. They feature a reversible ratchet mechanism which allows for quick back-and-forth motion to either tighten or loosen a fastener.
1/2'' Drive Extensions: A 1/2'' drive extension is an accessory for a ratchet that extends the reach of the socket and makes it easier to access hard-to-reach areas. It is usually made from metal and comes in a range of lengths.