5-Blade Crimper – Gutter Downspout

Use Malco’s 5 Blade Gutter Crimper to produce a crimp that downsizes corners of aluminum or steel downspout. The blades on this versatile hand tool produces a 1-1/4 inch (31.75 mm) long double crimp without deforming the downspout wall.  The factory-like crimp produced by this tool ensures that the downspout walls stay square for a tight fitting, leak-proof connection. The connection is also more self-supporting during installation. A handle closing stop maintains a consistent crimp profile. Hardened all-steel construction and a nickel chrome finish ensure long service life.

The Malco Gutter Crimper also features ergonomic RedLine Handle technology. An Engineered handle opening compliments the natural power stroke of any user’s hand and maximizes the powerful 7:1 mechanical advantage of compound-leverage head to handle linkage. Comfortable handle grip contours, a non-slip grip insert, spring handle actuation as well as a thumb-operated handle latch ensure a natural fit and feel for comfortable one hand 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.


Catalog #DescriptionThroat Depth in. (mm)Tool Length in. (mm)Net Weight oz. (g)
C4RDownspout Crimper1-1/4 (31.8)9 (229)16 (454)

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 Crimper – Gutter Downspout

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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.