1.Special heat treatment for the best combination of strength and impact resistance. 2.Advantages: Factory direct price (HD-0150)151PCS 1/4" & 3/8" & 1/2" Dr Socket and Wrench Combination Wrench Set SPECIFICATION DETAILS:10PCS-1/4" DR. METRIC SOCKETS : 4,5,6,7,8,9,10,11,12,13MM10PCS-1/4" DR. SAE SOCKETS : 5/32",3/16",7/32",1/4",9/32",5/16",11/32",3/8", 7/16",1/2"6PCS-1/4" DR. DEEP SOCKETS: 4,5,6, ...