6pcs Crimping Tool Drill Bit Set, Manual Copper Pipe Crimping Tool Drill Bit - Bearing Steel Drill Bit Expander with 7/8", 3/4", 5/8", 1/2", 3/8", 1/4" Tip

General description Set of 6 crimping tools for working with copper, ideal for air conditioning systems. This set allows copper tubes to be expanded and molded using an innovative system using friction heat. Technical specifications Material: Bearing steel Hardness: High Wear resistance: High and uniform Elasticity: High Drill size: 7/8", 3/4", 5/8", 1/2", 3/8", 1/4" Installation Install on a hand-held electric drill. Usage Used to expand copper tubes when installing air conditioning systems. Allows you to cast two copper tubes.