This hand tool socket set is chrome vanadium,and have reached "DIN"standard,please purchase it without any worried. 46PCS HAND TOOL SOCKET SET(1/4"&3/8")CONTENTS:14PCS-3/8DR.METSIC SOCKETS:8,9,10,11,12,13,14,15,16,17,18,19,21,22MM 4PCS-3/8'DR. DEEP SOCKETS(48L):8,10,12,132PC-3/8'DR. SPARK PLUG SOCKETS:16MM & 21MM2PCS-3/8DR.EXTENSION BARS:3"& 6 "1PC-3/8DR.UNIVERSAL JOINT1PC-3-WAY ADAPTOR1PC-3/8'DR ...