Swaging : A product of the swaging process with this making their way into HVAC systems lineset.Function: When conditioning is installed, expand copper tube, make two copper tube mutual link. (To be installed on hand electric drill.)Made of high-quality carbon steel material, durable.After installing the conditioner, unfold the copper pipe to interconnect the two copper pipes. It must be installed on a manual electric drill.Easy to Install: Perfect for installers, no matter if you are just learning or have been doing it.Height: about 45mm / 177in; 50mm / 197in; 55mm / 216inColour: blackMaterial: carbon steelSize: 7/8 (222mm), 3/4 (19mm), 5/8 (159mm), 1/2 (127mm), 3/8 (95mm), 1/4 (635mm)Package Contents:6 x Copper pipe forging bitOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.