Craftsman 4-Piece Socket Adapter Set, 9-4235 Quality steel alloy construction lets these adapters take on the toughest fasteners without cracking or slipping Includes 1/4", 3/8" and 1/2" drives so you can change from or to the most common sizes you'll encounter in automotive or household applications Chrome plating keeps corrosion at bay even in the challenging environment of an auto shop or construction work site The adapters allow you to use different drive size sockets with ratchets and The adapter allows you to plug in conjunction with better tools for all sockets and drive tools provide greater flexibility Backed by Craftsman's Lifetime Guarantee