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.

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.

• 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.