With standard and deep sockets, the Crescent 30-piece Mechanics Tool Set is ideal for the garage. This set has the tools you need for all your engine work, including SAE and metric sized sockets, 2 extensions, and a spark plug socket. Made by the world famous Crescent® brand. All tools in this set meet ANSI and ASME specifications and come with a full satisfaction guarantee. Constructed with Crestoloy® alloy steel for lasting durability. All tools contained in a sturdy, folding plastic case for easy storage and transport. Backed by the Crescent Limited Lifetime Guarantee. Sockets feature off-corner loading technology to virtually eliminate fastener rounding. 72-tooth ratchet requires only a 5-degree swing arc to turn a fastener. Mirror polish finish wipes clean easily. Ratchets have a large, quick-release button for easy operation.