GreatNeck 28010 SAE and Metric Mechanics Tool Set, 3/8-Inch Drive, 50-Piece Includes: 3/8" Drive Full Polish Ergonomic Ratchet (36 Teeth), 3" and 6" Extension Bars Features a variety of deep and shallow, metric and SAE sizes Manufactured from chrome vanadium steel for strength and durability All sockets feature an exclusive Posi-Grip Non-Slip design