Key Features

Centered Mortises Dual 2-inch fences support both sides of the work instead of just one. That gives you better control on narrow stock and makes it easier to place the mortise exactly where you want it. Woodpeckers Mortise Base Fit This router accessory mounts through the guide rod attachment points on compatible plunge routers. The adjustable setup is built to fit a wide range of plunge router layouts using 1/4 inch guide rods. Built To Stay True Aircraft-grade aluminum, stainless hardware, and stainless guide rods give the base a solid feel and smooth movement. That matters when you are cutting joinery that needs to line up cleanly from part to part.

Overview

The Woodpeckers Mortise Base is a dual-fence router accessory for plunge routers, model MB-14. This is a router mortising base designed for precise mortising and edge guiding with a plunge router. If you cut loose tenon joinery, traditional mortise-and-tenon joints, slots, or grooves, this setup gives you much better support than a typical single-side edge guide.

What makes this setup matter is the fence design. Standard router edge guides support one side of the workpiece, which can get sketchy fast when you are routing on a narrow edge. The Woodpeckers Mortise Base supports both sides with two fences that are each 2 inches wide, so the router stays planted and the mortise stays centered. That extra support is the difference between fighting the tool and getting repeatable joinery that fits the first time.

The adjustment system is built around your plunge router’s guide rod mounting points, so you can dial in the drag on the stock and the position of the mortise through the thickness of the material. Woodpeckers also calls out face indexing, which helps keep your mortises aligned from one part to the next when you reference from the same workpiece face. For joinery work, that kind of consistency is what saves time during assembly.

It is also more flexible than a one-job jig. Your mortise can be any length you want, as deep as your router bit will reach, and as wide as the router bit you install. Remove one fence and the base converts into a precision edge guide for trimming, slotting, and straight-line routing. That means the same accessory can move from mortising chair parts or table aprons to guiding a clean groove or edge cut without changing your whole workflow.

Construction is one of the strong points here. The base is machined from aircraft-grade aluminum with stainless hardware and stainless guide rods. In plain terms, that gives you a rigid platform that resists flex, corrosion, and wear. On joinery work, rigidity matters because small movements show up as loose or misaligned parts.

The MB-14 version includes 1/4 inch guide rods. Woodpeckers offers other rod sizes separately in the larger Mortise Base lineup, including 5/16 inch, 3/8 inch, and 10 mm versions, so the platform is aimed at fitting a wide range of plunge routers. The stated fit rule is straightforward: if your plunge router has guide rod attachment holes that go through both sides of the base and accept the correct rod size, this system is designed to fit. Woodpeckers specifically notes that it does not fit the Festool OF-2200.

This is a good fit for woodworkers who want cleaner mortises without stepping up to a dedicated mortising machine. It makes a lot of sense for furniture work, cabinet parts, loose tenon joinery, and any job where accurate routing along an edge matters. If you already own a plunge router and want more control from it, this is one of those accessories that can make the router earn its keep in a bigger way.

Better Support On Narrow Stock

The dual-fence layout is the whole reason this accessory stands out. Instead of hanging the router off one shallow guide, it supports the work from both sides so the cut stays stable and centered.

• Two fences, each 2 inches wide, give the base more bearing surface on the workpiece
• Designed to give pinpoint control over mortise position in the stock thickness

More Than A Mortising Jig

Pull one fence off and the setup works as an edge guide for straight routing. That gives you another use for the accessory when the job calls for grooves, trimming, or controlled edge work.

• Converts from dual-fence mortising setup to single-fence edge guiding
• Useful for slotting, groove work, and straight-line routing with a plunge router

Rigid Build, Smooth Adjustment

Joinery accessories need to hold settings and move cleanly. The aluminum body, stainless hardware, and stainless rods are there to keep the system rigid, corrosion-resistant, and dependable over time.

• Machined aircraft-grade aluminum body
• Stainless hardware and guide rods for smooth travel and long service life

What’s in the Box

• (1) Woodpeckers Mortise Base system
• (1) Set of 1/4 inch guide rods

Router, clamps, and additional guide rod sizes are sold separately.

Key Specifications

Compatibility

Router Platform Fits compatible plunge routers that use guide rod attachment holes through both sides of the base. Included Rod Size MB-14 includes 1/4 inch guide rods. Other Rod Options The Mortise Base platform is also offered with 5/16 inch, 3/8 inch, and 10 mm guide rod sizes. Additional guide rods are sold separately. Known Limitation Woodpeckers states this system does not fit the Festool OF-2200.

Built For

Woodworking Furniture Making Cabinet Work Loose Tenon Joinery Mortise-and-Tenon Joinery Edge Guiding Groove Routing Narrow Stock Routing

Pro Tip

Reference all matching parts from the same workpiece face when you set up the Mortise Base. That takes advantage of the face-indexing design and helps keep multi-part joinery lined up during glue-up.

Tool Nut’s Take

Tool Nut’s Take

Woodpeckers Mortise Base Makes A Plunge Router Way More Useful

If you already own a plunge router and want cleaner, more repeatable joinery, this accessory is a smart buy.

• Who it’s for: Woodworkers, cabinetmakers, and serious DIY users cutting mortises, loose tenon slots, grooves, and edge-guided cuts.
• Why it stands out: The dual 2-inch fences give you real support on narrow stock, and the build quality is what you want in a precision routing accessory.
• Worth knowing: This MB-14 version is the 1/4 inch guide rod model, so router fit matters. Check your plunge router’s guide rod size and layout before you order.

Common Questions

• What kind of router does this fit? It is designed for compatible plunge routers that have guide rod attachment holes through both sides of the base and accept 1/4 inch guide rods.
• Can it be used for something other than mortising? Yes. Remove one fence and it can be used as a precision edge guide for trimming, slotting, and straight-line routing.
• What is the fence width? Each fence is 2 inches wide.
• Does it fit every plunge router? No. Woodpeckers states it fits most compatible plunge routers, but it does not fit the Festool OF-2200.