... of container twist lock 3.Qualified machining Description:1. Name: 45# steel investment casting container twist lock 2. Technology: investment casting ... 3. Material Grade: 45# 4. Standard: ASTM, JIS,DIN,BS,NF 5. Finish: ... steel, Carbon steel, Alloy steel such as 304, 316, 25#, 45#, 40Cr,ect.R&D capacity:Professional tooling development & process & ...