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

2. Production technology: Matt/Satin finish, heat treated,chrome-plated

3. Size:10mm,11mm,12mm,13mm,14mm, 15mm,16mm,17mm,,18mm,19mm;

3/8",7/16",1/2",9/16",5/8",11/16",3/4",13/16",7/8",15/16",1"

4.package: hanging card, plastic rack,plastic box,double blister etc.

Or according to customer’s requirement.

5.Quality conform to ANSI and DIN3113 standard,