HVAC Swage Tool Swage Bit Set 6 Pieces with Quick-Release Holder and Carabiner. Copper Boring Bits Swage copper pipe from 1/4, 3/8,1/2, 5/8,3/4,7/8. Made of HHS Steel for long-lasting performance. RyMarCool Swaging Bits are preferred by Professional Tradesman. Great for HVAC Technicians, Installers, Plumbers, Machineists, and Homeowners. Great Gift idea for your loved ones, friends, and co-workers. All RyMarCool products come with a 100% Customer Satisfaction Guarantee!