Profile: Cornerstone Connection, Inc. is a source for precision molds, dies, mold components, die components and precision machined parts. We are a contract manufacturer of mold components, die components and machined parts. We perform projects that range from replacing single, critical parts to spear-heading large, complex multifaceted projects. We machine a variety of materials, such as conventional metals, carbide, mild case hardened, stainless steel and hardened steel. Our services include machining, hard turning, milling, CNC & conventional EDM, all types of grinding & welding and fabrication.