[6 Pipe Sizes & 5-in-1 Bit Combinations] Includes 6 drill bit sizes: 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, and 7/8 inch, plus 1 piece of 5-in-1 flaring tool. These expanders feature a hexagonal shank and are compatible with various manual and electric drills. Designed for HVAC copper pipe expansion tasks. [High-Quality Bearing Steel] Made from durable, wear-resistant bearing steel to resist rust and ensure long service life. [Compact Design & High Efficiency] Smaller and more portable than traditional manual copper pipe swaging tools. Compatible with electric drills for efficient, uniform expansion without excessive force. Helps prevent copper pipe deformation, cracking, or irregular shaping. [Function] Used to expand copper tubing for secure connections in HVAC applications. Maintain appropriate drill speed during use. Preserves ductility of copper and aluminum to reduce risk of cracks or leaks. [Easy to Use] Suitable for HVAC technicians performing copper pipe expansion without extensive training. Always wear appropriate safety gear, including gloves and goggles, during operation. The flare design enables controlled, precise expansion to the required inner diameter. Color: Black & Wine Red Material: Carbon Steel Sizes: 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch Package Contents: 13 x Copper Flaring Tool Pipe Expander Bits