The CHALLENGER Fine Tools 16-Piece Socket Set by Proto is a high-quality set of hand tools designed for automotive use. Made in the USA, the set includes sockets ranging in size from 7/16" to 1-1/4" drive. The chrome finish ensures corrosion resistance. The set includes extensions, ratchets, and adapters for versatile use. The durable blue metal box measures 18-3/4"L x 6" W x 4"H.