By Swiilpo

6 Sizes of Drill Bits: Our swaging tool drill bit is suitable for 6 different pipe sizes, including 1/4"(6. 3mm), 3/8" (9. 5mm), 1/2"(12. 7mm), 5/8"(15. 9mm), 3/4"(19mm), 7/8" (22. 2mm), 1/4" drill bits hexagon handle(handle diameter: 7mm). Meeting the need for maintenance of air conditioners. High Quality Bearing Steel: The hvac tools drill bit set are made of durable and wear-resistant bearing steel which help prevent the boring drill bits from rusting, and has a long service life. Small Size and High Efficiency: Compared with traditional manual copper pipe swaging tool hvac, our electric boring drill bits are small in size, easy to carry and easier to use, no need to vigorously expand the copper pipe hole, with the electric drill with our drill bits, you can easily expand the hole diameter. The force of the electric drill bits are uniform, which will not cause the copper pipe to break, or not round and smooth. Function: This HVAC repairing swage tool can expand the copper pipe, so that you can link the two copper pipes to each other. It is great for air conditioning repairs. But please note that the drill speed should not be too fast. Package Include: Drill Bit*6; 14 holes storage bar*1. 1-year warranty: We provide 1-year warranty, Please feel free to contact us if there’s any question and we will get back to you ASAP.