Sockets made of hardened Cr-V alloy steel with satin chrome finish. Master set includes shallow and deep sockets in sizes 4mm through 15mm and 3/16’’ through 9/16’’, covering most small and medium size fasteners. 10’’ 90-Tooth 1/4’’ Dr. Heavy Duty Ratchet meets 200% of ANSI. Conveniently packed in EVA foam to add directly to your toolbox.