Steelman 95330 9-Piece Magnetic Extension Set, 1/4, 3/8, and 1/2-Inch Drive MAGNETIC TIP - Protruding magnetic tip converts any standard length socket into a magnetic socket when attached 3 DRIVE SIZES - Set includes 3 extensions for each drive size 1/4, 3/8, and 1/2-inch EXTENSION LENGTHS - 1/4-Inch Drive: 2, 4, and 10-inch; 3/8-Inch Drive: 3, 6, and 10-inch; 1/2-Inch Drive - 2, 5, and 10-inch KNURLED SHAFT - Knurled shaft for a secure grip when hand starting nuts and bolts IDEAL IN TIGHT SPACES - Ideal for tight spaces where the magnet prevents nuts or bolts from falling out RESILIENT STEEL - Made of strong and resilient chrome vanadium steel for a lifetime of use CORROSION RESISTANT - Corrosion and rust resistant polished chrome finish