Malco Products, #JCCR J Channel Cutter, Redline, 5/8 in.

The Malco JCCR J-Channel Cutter (5/8") is a compound-leverage hand tool designed to cut drain tabs, downstream notch cutouts, and 45° miter cuts in vinyl J-channel. It produces consistent cuts with controlled pressure, allowing installers to quickly form clean, functional trim details during siding installation.

Key Features

• Cuts drain tabs, notch cutouts, and miter joints in vinyl J-channel
• Designed for 5/8" J-channel (model JCCR)
• Produces a single “click” when the cut is complete for consistency
• Graduated jaw markings allow depth control from ~3/8" to 1-1/4"
• Jaws can be used on either side to create 45° miter cuts
• Compound leverage (~7:1) reduces cutting effort
• Hardened steel construction with corrosion-resistant finish
• RedLine ergonomic handles with one-hand latch operation

Model: JCCR

Type: J-channel cutter

Channel Capacity: 5/8" (15.9 mm)

Cut Depth Range: ~3/8" to 1-1/4"

Operation: Manual compound leverage

Material: Steel (nickel chrome / black oxide finish)

Application: Vinyl siding J-channel

Length: ~8-7/8"–11.75" depending on listing

Q: How consistent are the cuts when you’re doing a lot of pieces back-to-back?
A: The tool is designed to produce repeatable cuts, so once you’re set up, it helps keep your notches and tabs uniform across multiple pieces.

Q: Does it matter which side of the J-channel you cut from?
A: Yes, positioning the channel correctly in the jaws is important depending on the type of cut you’re making, especially for miters and directional tabs.

Q: Can you make adjustments mid-cut if something feels off?
A: Once pressure is applied and the cut starts, it’s best to complete the cut rather than trying to reposition, to keep the cut clean and accurate.