Description:  6pcs 1/4-7/8'' Imperial Hexagonal Tube Expander Drill Bit Air Conditioner Copper Pipe Flaring Tool Rotary Swaging Tool.     Specifications:  Product Name:Swaging Tool Drill Bit Set;  Material:Bearing steel;  Surface treatment:Blackening;  Size:1/4'' (6.3mm), 3/8'' (9.5mm), 1/2'' (12.7mm), 5/8'' (15.9mm), 3/4'' (19mm), 7/8'' (22.2mm);  Height:1/4 & 3/8'' (45mm), 1/2 & 5/8'' (50mm), 3/4 & 7/8'' (55mm)  Quantity:6pcs;     Features:  -Swaging Tool:A product of the swaging process with this tool making their way into HVAC systems lineset.  -Function:When air conditioning is installed, expand the copper tube to make the two copper tube interconnected. (To be installed on hand electric drill.) -Material:Bearing steel, durable and not easy to break, wear resistant to use.  -Multi Size:7/8", 3/4", 5/8", 1/2", 3/8", 1/4", 6 different sizes per set of your choice to meet your needs.  -Easy to Install:Perfect for installers, no matter if you are just learning or have been doing it.     Package Included: 6 X Swaging Tool Drill Bit