Few things are as aggravating as reaching into a tight space with an extension only to have the fastener in the socket fall out before you could get it into place forcing you to fish it out before you can continue. The STEELMAN 95330 9-Piece Magnetic Extension Set was designed to prevent this from happening by adding a protruding magnetic tip that converts any standard length socket into a magnetic socket when attached. This set includes a 2, 4, and 10-inch extension for 1/4-inch drive sockets; a 3, 6, and 10-inch extension for 3/8-inch drive sockets; and a 2, 5, and 10-inch extension for 1/2-inch drive sockets. Each extension is knurled on the shaft to give you a secure grip when using them to hand start nuts and bolts. Each extension is made of strong and resilient chrome vanadium steel with a polished chrome plating for a lifetime of use.