Features: Works with cordless drill driver(not included) to expand the pipe to couple to another pipe to be brazed. The 6pcs swaging spin set comes in multiple sizes - 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch. All-purpose hex shaft fits into all the electric drill driver in the market. All steel construction with black coating, solid and sturdy to use. Can be applied for the installation and repair of mini split system, air conditioner, refrigerator, HVAC and more. Note: *Needs to be installed on electric drill driver. *Better to wear protective gloves to avoid getting hurt. Specifications: Material: Steel Color: Black Size: 1/4 inch(6.3mm), 3/8 inch(9.5mm), 1/2 inch(12.7mm), 5/8 inch(15.9), 3/4 inch(19mm), 7/8 inch(22.2mm) Length: 55mm, 50mm, 47mm, 45mm, 40mm, 40mm Package Weight: 177g / 6.24oz Package Size: 10*7*3cm / 3.93*2.75*1.18in Packing List: 6 * Pipe Expander