... container twist lock 3.Qualified machining Description:1. Name: 45# steel investment casting container twist lock 2. Technology: investment ... , Carbon steel, Alloy steel such as 304, 316, 25#, 45#, 40Cr,ect.R&D capacity:Professional tooling development & process & ... Co., Ltd is specializing in manufacturing precision casting which is used for Auto parts, locomotive parts, truck parts, motorcycle parts, ...