Crescent, 11 piece, 3/8" drive, pass-thru, adjustable wrench & socket set, universal sockets fit both sae & metric fasteners, manufactured of heat treated forged alloy steel for toughness & durability, laser etched sizes, sae/mm, makes it quick & easy to find the right socket for the fastener size, reversible jaw with angled tooth pattern acts as a pipe wrench & provides extra gripping force, pass-thru socket/wrench system works over long threaded rod where normal ratchets & sockets won't fit, sockets work on 6 point, 12 point, square, e-torx, spline & partially rounded hex fasteners, corrosion resistant black phosphate finish, includes 1 each of the following sockets: 3/8" (10mm), 7/16" (11mm), 15/32" (12mm), 1/2" (13mm), 9/16" (14mm), 19/32" (15mm), 5/8" (16mm), 11/16" (17mm), 23/32" (18mm), 3/4" (19mm) & convenient storage tray.