J-Channel Cutters

Use Malco’s versatile J-Channel Cutters to make drain tabs, downstream notch cutouts, and miter trim cuts in vinyl channel. Available in three sizes for 1/2 inch (12.7 mm) channel using model JCC50R, 5/8 inch (15.9 mm) channel using model JCCR, and 3/4 inch (19.1 mm) channel using model JCC75R. Tool operation is fast and easy! Light hand pressure produces a single handle click signal to ensure perfect drain tabs every time. Graduations on the upper jaw easily gauge tab or notch depths from 3/8 to 1-1/4 in. (9.5 – 31.2 mm). Use either side of the jaws to cut a 45-degree miter for a professional finished look. Hardened all-steel construction with rust resistant nickel chrome and black oxide finishes ensures long service life.

Malco’s J-Channel Cutters also feature 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, and a thumb-operated handle latch ensure a natural fit and feel for comfortable one hand operation anywhere on the job.

NOTE: The JCC75R knockout is sized for industry standard ¾ in. J-Channel, which typically runs 1 in. To prevent water damage from freezing, this tools knockout is 1 in., and not ¾ in.


  • Make drain tabs, downstream notch cutouts and miter trim cuts in vinyl channel fast and easy.
  • Graduations on jaw easily gauge tab and notch depths.
  • Compound leverage produces 7 to 1 mechanical advantage.
  • Ergonomic Redline Handles won’t wear you down.


Catalog #DescriptionKnockout Width in. (mm)Jaw Width/J-Channel Size in. (mm)Throat Depth in. (mm) AdjustableNominal Length in. (mm)Net Weight oz. (g)
JCC50RJ-Channel Cutter.655" (16)1/2 (12.7)3/8 - 1-1/4 (9.5-31.2)8-7/8 (225)16 (454)
JCCRJ-Channel Cutter.840" (21)5/8 (15.9)3/8 - 1-1/4 (9.5-31.2)8-7/8 (225)16 (454)
JCC75RJ-Channel Cutter.975" (24)3/4 (19.1)3/8 - 1-1/4 (9.5-31.2)8-7/8 (225)16 (454)
5018Replacement Spring
- Fits all JCC models


My Review for J-Channel Cutters

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Revised review
Originally bought the JCC75R but it didn't work in my J-Channel. Spoke with customer support and he was very helpful. He gave detailed explanation of how the sizing works with these cutters and various J-Channels. He shipped out the 5/8" JCCR cutters same day and I received them three days later. They are working perfectly on my J-Channel and I'm back in business. Great customer support!

Response for Wallace

Response for Wallace
The manufacturers of J-Channel have never adopted a uniform measurement system therefore it is possible that the brand you are using is narrower than this tool was designed for, Malco offers a JCCR that might fit your brand of J-Channel better.


I bought the JCCR75R & it seems to be too large for my 3/4" channel. Very tight to side in the end. do I have the wrong tool?

Peter Riley

Four Stars
Does the job.

Gareth Embrose Jr.

Four Stars
Worked well.


Great tool
This tool is pretty good.If you purchase this,the following instructions are mandatory to make this tool profitable:After attaching the J to the wall and going to the next corner use a small scrap (4-6",easy to put in pouch) of the J you are using. Punch out both sides.Now just slip that over the loose end of the J & make your cut mark.

M. Hitchcock

Awesome Tool!
This tool saved us a lot of time and frustration when crimping the J-channel to put around our windows. We put vinyl siding on our own house and this tool was a great help and definitely worth the money.

P. Tjarks

Worked well
It gave me nice straight perfect cuts, really sped up my trim time, a definite must have tool, but make sure you get the right size.