1. Material: drop-forged 40CR-V or 45# CARBON STEEL

2. Production technology: Mirror polished, Matt, Satin finish, 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;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.package: according to customer’s requirement.

5.Quality conform to ANSI and DIN3113 standard,