Sigma Tool & Machine Ltd is a leading manufacturer known for introducing and patenting the first 4 prong T-Nuts with an 8-sided base, setting the standard for machine-driven T-Nuts. They offer a range of T-Nut insertion machines and custom Tee Nut Machines, along with a variety of furniture clips and installation equipment. With a commitment to exceptional quality and ISO 9001:2015 registration, Sigma serves demanding applications across various industries.