6 Sizes of Swaging Tool HVAC Kit: 13pcs swage tool hvac kits with bit holder and keychain. including 6 different pipe size drill bit: 1/4"(6.3mm), 3/8" (9.5mm), 1/2"(12.7mm), 5/8"(15.9mm), 3/4"(19mm), 7/8" (22.2mm), and 1/4" drill bits hexagon handle(handle diameter: 7mm). Multi-Size meeting diverse installation and maintenance of air conditioners, making it an ideal choice for HVAC technicians. High-Strength Material: The havc tool drill bit set is made of durable and wear-resistant carbon steel, which hardens at high temperatures and molded. You can use it to quickly and accurately expand copper pipes to the desired diameter, ensuring tight and seamless pipe connections. This material also helps prevent the drill bit from rusting and has a long service life. Wide Range of Applications: The copper tube expander tool is mainly used to expand the diameter of copper tubes. It can be used in many copper pipes systems, such as HVAC, piping engineering, refrigeration systems, industrial equipment, small copper pipe connections in home maintenance. Reduce the use of connectors and lower costs. Portable and Versatile: Equipped with bit holder and keychain, the tool is compact and lightweight, easily attachable to key rings, tool bags, or backpacks for convenient access anytime, anywhere. Whether working at heights or on outdoor repairs, it’s easy to carry and adapts to multiple scenarios. Easy to Use: The copper pipe tube expander swaging tool is used with an electric drill. To achieve the desired effect, securely fasten the copper tube before use and verify that its dimensions are compatible with the drill bit. During operation, apply force evenly and the drilling speed should not be too fast to avoid deformation or cracking of the copper tube. We recommend cleaning and lubricating the tool before and after use to maintain its peak performance. WADEO 12PCS Swage Tool HVAC Repairing Set with Bit Holder