Tool Drill Bits, 5pcs Manual Copper Pipe Tool Drill Bit Set Portable Bearing Steel ，7/8'', 3/4'', 5/8'', 9-12mm, 6-10mm Bits

Function: After installing the air conditioner, expand the copper pipe to form two copper pipes connected to each other. The contact between the flare and the valve surface is stronger through friction, and the heat is used to form the pipe.

Very Convenient: 7/8"(89mm/3.5inch), 3/4"(87mm/3.4inch), 5/8"(85mm/3.34inch), 9-12mm(86mm/3.3inch), 6-10mm(96mm/3.77inch), 5 different sizes, can meet your needs.

Precision:The size of the bell mouth is the same, and it fits perfectly. The rocker has a perfect depth and fits tightly, which reduces the fatigue pressure of the coupling part.

Perfect Depth: A full range of forging tools can easily expand HVAC pipes, and forged plugs will provide a greater exchange depth for perfect fit. Note: glove handling may be caused by friction Heat.

Easy Installation:After installing the air conditioner, expand the copper pipe to make 2 copper pipes. (Requires manual electric drill installation) It is very suitable for installers, whether you are learning or have been doing it.