Woodpeckers MJ-24 Mortising Jig

Key Features

Cut Accurate Mortises The Woodpeckers Mortising Jig gives your plunge router a controlled path for cutting clean mortises. It handles mortises up to 3-1/2 inches long, which covers a lot of common joinery work. Position It Precisely The horizontal table adjusts forward and backward so you can place the mortise exactly where you need it. That matters when layout has to match from part to part. Clamp Odd Shapes Horizontal and vertical T-slots in the clamping table make it easier to secure different workpiece shapes and sizes. That gives this mortising jig more flexibility than a one-position fixture.

Overview

The Woodpeckers MJ-24 Mortising Jig is a router mortising jig built for woodworking joinery. This is a mortising jig designed for cutting accurate mortises with a plunge router. Model Number: MJ-24. If you want repeatable mortise placement without building a one-off shop jig every time, this setup is the practical answer.

What makes the Woodpeckers MJ-24 Mortising Jig useful is that it works with your plunge router and accepts any metric or standard bit. That gives you flexibility when matching mortise width to the stock and tenon you are building around, instead of being locked into a fixed cutter size. The jig also supports mortises up to 3-1/2 in. (88 mm) long, which is enough range for a wide mix of frame, door, table, and casework joinery.

On the bench, placement is where a jig either earns its keep or wastes your time. Here, the horizontal table adjusts backward and forward, letting you dial the mortise position in instead of settling for close enough. For furniture makers and serious shop users, that means less layout correction, better alignment between mating parts, and less trial-and-error before you make the cut.

The clamping setup is another real advantage. Woodpeckers milled T-slots both horizontally and vertically into the clamping table, so the jig can hold workpieces regardless of shape or size more effectively than a flat, fixed-face design. That matters when you are working with narrow rails, curved parts, or parts that do not sit the same way twice. The whole point is to keep the stock stable while the router does the work.

From the images, this woodworking jig is built as a bench-mount fixture intended for controlled joinery work rather than quick rough production cuts. It is the kind of tool that makes sense for cabinetmakers, furniture builders, custom woodworkers, and advanced DIY users who care about clean joinery and repeatable results. It is also made in the USA, which will matter to buyers who pay attention to where shop fixtures are built.

If your work regularly includes mortise and tenon joinery, the Woodpeckers MJ-24 Mortising Jig solves a very specific problem: getting accurate mortises with a plunge router without cobbling together shop-made guides for every part. For occasional users, it is a precision fixture. For dedicated woodworkers, it is a time-saver that also improves consistency.

Router Mortising Without the Guesswork

This is where the jig earns its spot in the shop. Instead of freehand routing or relying on a temporary setup, the jig gives you a controlled way to cut joinery with better consistency from part to part.

• Designed for use with a plunge router
• Built for accurate mortise placement in woodworking stock

Adjust the Mortise Where You Need It

The forward and backward table adjustment gives you more control over final mortise location. That is a big deal when joinery has to line up cleanly across rails, stiles, legs, or aprons.

• Horizontal table adjusts backward and forward
• Supports mortises up to 3-1/2 in. (88 mm) long

Clamps More Than Straight Stock

Not every workpiece is a simple square rail. The clamping table uses both horizontal and vertical T-slots so you can secure parts more effectively, including pieces with awkward shapes.

• Horizontal and vertical T-slots increase clamping options
• Semble clamps shown in images are sold separately

Key Specifications

Model Number	MJ-24
Brand	Woodpeckers
Tool Type	Mortising Jig
Maximum Mortise Length	3-1/2 in. (88 mm)
Bit Compatibility	Any metric or standard router bit
Table Adjustment	Horizontal table adjusts backward and forward
Clamping Table	T-slots milled horizontally and vertically
Made In	USA

Compatibility

Router Bit Fit Works with any metric or standard bit used with your plunge router. Router Type Designed for mortising with a plunge router.

Built For

Woodworking Furniture Making Cabinetry Mortise and Tenon Joinery Custom Shop Work Serious DIY / Hobbyist

Pro Tip

Before you rout your finished parts, use the MJ-24 to dial in mortise location on scrap from the same thickness. Once the table position is set, repeatability gets a lot easier and you waste less good stock.

Tool Nut’s Take

Tool Nut’s Take

Why the Woodpeckers MJ-24 Mortising Jig Makes Sense

This is a smart buy for woodworkers who want cleaner mortise and tenon joinery from a plunge router without building a custom jig every weekend.

• Who it’s for: Furniture builders, cabinetmakers, and serious woodworking users who want accurate router mortising.
• Why it stands out: It combines adjustable mortise positioning, support for metric and standard bits, and a more flexible T-slot clamping setup.
• Worth knowing: The images note that Semble clamps are sold separately, so make sure your clamping plan matches the work you want to do.

Common Questions

• What kind of tool is this? It is a mortising jig designed to help you cut mortises with a plunge router.
• How long of a mortise can it cut? The images state it can cut mortises up to 3-1/2 inches (88 mm) in length.
• Does it only work with one bit system? No. The product images state it works with any metric or standard bit.
• Can it hold different workpiece shapes? Yes. The clamping table has both horizontal and vertical T-slots to help secure different shapes and sizes.