5-Blade Gutter Downspout Crimper

If you are looking for a tool that efficiently downsizes the corners of aluminum or steel downspout, then the Malco 5 Blade Gutter Downspout Crimper is the tool you are looking for. The 5 blade design produces 1-1/4 inch (31.75mm) long double crimps without causing 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 Downspout Crimper compliments the natural power stroke of any user’s hand. It also maximizes the powerful 7:1 mechanical advantage of 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 handed operation.


  • Quickly downsize ends downspout to create a male connection.
  • Creates a tight fitting factory-like crimp.
  • Compound leverage produces 7 to 1 mechanical advantage.
  • Ergonomic Redline Handles won’t wear you down.


Capacities: in (mm)

Aluminum Copper Stainless Steel 26 Gauge Galvanized Steel 24 Gauge Mild Steel 24 Gauge
.035 (0.89) .023 (0.58) .018 (0.46) .028 (0.71) .024 (0.61)



My Review for 5-Blade Gutter Downspout Crimper

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Copper By Design & DMR Gutters

Well Made Crimper

As a hands-on gutter contractor for the last 26 years I have used these tools daily and had yet to have them fail on me or even wear out. I love the new Redline handles with the easy to use thumb lock. I had only had one handle break on me after a long drop off a roof, but you cannot expect it to withstand that sort of abuse. They also make an off-set version of this crimper not shown here. I have bought several pair of these over the last few years, which each seem to have a different action and depth to the blades. Not sure why, but the variety has been useful at times.

Jeffrey Boyle

A professional product no problem

A professional product, no complaints

Tony Tilzer

I use these to crimp downspout material.

I use these to crimp downspout material. They are okay as long as you don't crimp too hard. Too much pressure cuts the material instead of crimping it.


Very happy with them

Where have these been all my life? Very happy with them.