24 Piece Mechanics Tool Set - SAE & Metric Contains 21 commonly used metric and SAE sockets, 1 SAE spark plug socket, 1 ratchet and 1 extension Constructed of chrome vanadium steel for strength and durability with professional grade, high-polish finish Fine, 90-tooth ratcheting design provides of arc swing Organized in a blow-molded case for convenient storage and easy transportation Hassle-Free Lifetime Guarantee