If you are looking for a tool that efficiently downsizes the corners of aluminum or steel downspout, then the Malco 5-Blade Gutter Crimper is the tool you are looking for. The blades produce 1-1/4 inch (31.75mm) long double crimps without causing the deformation of downspout walls. A factory-like crimp ensures the downspout walls stay square for a tight-fitting, leak-proof connection. A handle closing stop helps to maintain a consistent crimp profile. Made with hardened all-steel construction and a nickel-chrome finish, you can be assured this tool will last a long time. Added power and comfort is also achieved with RedLine Handle technology. The handle opening of the Gutter Crimper compliments the natural power stroke of any user's hand and maximizes the powerful 7:1 mechanical advantage of the compound-leverage head to handle linkage. Every handle is made with non-slip grip inserts, comfortable Handle grip contours, spring handle actuation and a thumb-operated handle latch. All of these qualities ensure a natural fit and feel for comfortable one-hand operation.