Tube Notching Templates - 90 degree - Oversized

The Tube Notching Templates - 90 Degree - Oversized kit extends Keystone Met’L Co.’s proven layout system to large-diameter tubing from 3.25 inches through 4 inches OD. Designed for fabricators working beyond standard 3-inch tubing, this four-piece set provides a faster, more repeatable way to lay out accurate 90° fish-mouth cuts.

Instead of building disposable paper patterns or repeating the same measurements for every joint, select the template that matches your tube’s outside diameter, slide it into position, and trace the cutting profile. The clearly defined layout line gives you a consistent reference for cutting, grinding, and final fit-up.

Made for Large-Diameter Fabrication

Tube Notching Templates - 90 Degree - Oversized are ideal for custom exhaust work, large-diameter tube assemblies, structural fabrication, and other projects that require clean 90° tube intersections. Each reusable template helps simplify layout work at the bench and supports consistent results across one-off builds or repeated production cuts.

Four Oversized Tube Sizes

Sizes indicate the outside diameter (OD) of the tubing you are working with. Every oversized kit includes:

• One 3.25-inch OD template
• One 3.5-inch OD template
• One 3.75-inch OD template
• One 4-inch OD template

Simple, Repeatable Layout

1. Match the template to the tubing OD.
2. Position the template at the intended 90° joint.
3. Trace the fish-mouth cutting profile.
4. Remove the template, cut along the marked line, and finish the fit as required.

The Tube Notching Templates - 90 Degree - Oversized kit is the purpose-built extension of KMC’s classic 90° template system for fabricators who need the same straightforward workflow on larger tubing.

Spend less time measuring and more time fitting. Built for the shop. Designed for precision.

Sharpie not included. Actual colors may vary slightly from photos.