TIG Torch Collet UNIMIG TIG Torch Collets are manufactured to hold your tungsten securely in place after tightening the back cap. UNIMIG TIG Torch Collets are made from high-grade tellurium copper, which gives added advantages such as higher heat resistance and more effective current transfer resulting in superior welds. Manufactured to be 100% compatible with OEM parts Made with tellurium copper Higher heat resistance More effective current transfer