website:https://www.jhmindustry.com/
Shanghai Jian & Mei Industry and Trade Co., Ltd. is the company which manufacture and export fasteners and metal hardware, founded in 2006, with import-export authority. Now, 80% products export to all over the world and 20% sell in domestic market.
A quick demonstration on how to load bolt grips into a universal testing machine. These types of grips are ideal for tested any type of anchor bolt, stud, or threaded rod. There are a few different grades based on the strength of the carbon steel.
https://www.universalgripco.com/#!astm-a307/rzdyy