Collis Toolholder Corporation is an ISO compliant US manufacturer of tool holders, chucks, collets, and more, with over 100 years of experience. Collis manufactures quick-change adapters, tension and compression, tap drivers, and much more, and they are the only manufacturer to certify AT3 or better tool holders. As a major American manufacturer of a full-line of tool holders, Collis offers the perfect solutions for all your metalworking needs.