Versatile Tool: This PLATATO sheet metal crimper is used for crimping 24-28 gauge metal pipes to create male fitting ends. It can can downsize the pipe diameter and make perfect connection in duct work and venting work, such as HVAC duct, gutter downspout, stove pipe, dryer exhaust vents, chimney pipe and so on. Easy to Use and Efficient: The 5-blade design of our gutter crimping tool allows to efficiently create uniform crimps for the end of duct pipe. The 10.5-inch length provides enough leverage, making rain gutters and downspout installation much easier. Convenient Design: The newly designed duct crimper tool comes with a security lock to ensure safety use and keep the sheet metal tool compact for easy storage. It also has a lanyard hole design, which is convenient for working at altitude. Heavy Duty and Well Made: The blades of this sheet metal crimping tool are made of 50# steel plate that has high hardness, and the surface is treated by bright plating finish which is not e