ITEM NAME:6Pcs Swaging Tool Drill Bit Set 1/4" 3/8" 1/2" 5/8" 3/4" 7/8" Tube Expander Kit.6pcs x Copper Pipe Swaging Tool Drill Bits. Shank type: 7mm Triangular Shank. Expand copper tube during air conditioning installation to make two copper tubes. It must be installed in a manual electric drill.
