Item No.: H15E745
·Material ：40CR  (CRV)   
·SIZE:1/4",5/16",3/8",7/16",1/2",9/16"(8mm,10mm,11mm,12mm,13mm,14mm)   
·lengths : 2-9/16" (65M/ML)   
·Surface treatment: electroplating  (Black)   
·Heat treatment