1.40CR-V， 45# carbon steel

2.Mirror polished, heat treated, chrome plated

3. Size:6mm,7mm,8mm,9mm,10mm,11mm,12mm,13mm,14mm, 15mm,16mm,17mm,,18mm,19mm., 20mm,21mm,22mm,23mm,24mm,25mm,26mm,27mm,28mm,29mm,30mm,31mm,32mm; 1/4",5/16",3/8",7/16",1/2",9/16",5/8",11/16",3/4",13/16",7/8",15/16",1",1-1/16",1-1/8",1-1/4"

4. Packing：hang card, plastic rack, double blister or according to customer's requirement

5.Quality meet DIN and ANSI standard