Profile: Tech-Line Engineering Co. focuses on designing and building special machines. We specialize in the area of sheet metal fastening systems, with emphasis in the automotive and appliance industries. We build welders, clinch equipment, pierce units, staking equipment and assembly equipment. We also do turn-key robot integration. Our Button-Lock is a type of clinching method, used to hold ductile sheet materials together. It is a leak proof clinch and does not shear the parent material. We are accredited with ISO 9001 certification.