Tubalcain makes a combination 3/4″ wrench & brass hammer to tighten & loosen the draw bar on a Bridgeport mill. This is version 1 (made with brass) . Be sure & watch Tips #144 which is version 2 made with heavy lead.
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.