Features:Works with a cordless drill driver (not included) to extend pipe to mate with another pipe to be brazed.The 6pcs crimping rotation set is available in multiple sizes - 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch.The all-purpose hexagonal shaft fits all electric drills on the market.All steel construction with black coating, solid and sturdy to use.Can be applied for installation and repair of mini split system, air conditioner, refrigerator, HVAC and more. To note:* Must be installed on an electric drill.* Better to wear protective gloves to avoid injury.Features:Material: Steel Color: Black Size: 1/4 inch (6.3 mm), 3/8 inch (9.5 mm), 1/2 inch (12.7 mm), 5/8 inch (15.9), 3/4 inch (19 mm ), 7/8 inch (22.2 mm) 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