... service. 2.15 year experiences of investment casting for pad lock. 3.R&D pad lock Description:1. Name: Carbon steel lost wax ... casting pad lock 2. Technology: lost wax casting 3. Material Grade ... steel such as 304, 316, 25#, 45#, 40Cr,ect.R&D capacity:Professional tooling development & process & designProduction Equipments:Three lost wax ...