... EXTENSION: 6"1PC-1/4" DR. BIT ADAPTOR18PCS-1/2" DR. SOCKETS: 10,11,12,13,14,15,16,17,18,19,20,21 ... ,19MM2PCS-1/2”DR.SPARK PLUG SOCKETS:16MM&21MM2PCS-1/2”DR.EXTENSION BARS:5”&10”1PC-1/2”DR.UNIVERSAL JOINT1PC-1/2”DR.BIT HOLDER1PC-1/2”QUICK ... CASEDescription:Marterial:Chrome-vanadium steel.Surface treatment:Honed Nickel PlatedSockets and Bit Rigidity is HRC48-52°.Dual Color Handle in TPR ...