Freud 89-660 3 Piece Undersized Plywood Router Bit Set is made for woodworkers, cabinet installers, and serious DIY users who need grooves and dadoes that actually match modern sheet goods. This is a router bit set designed for routing perfectly fitted grooves and dadoes in undersized plywood panels. Model Number: 89-660. Instead of cutting a slot based on nominal 1/4 inch, 1/2 inch, or 3/4 inch labeling, this set matches the true thickness of common plywood so your joinery fits the way it should.

The real advantage here is accuracy without guesswork. Modern plywood almost never measures exactly to its labeled size, and that is where standard straight bits can leave you with loose dados, sloppy shelf joints, and extra setup time. This set gives you three undersized plywood bits sized to match actual panel thicknesses for 1/4 inch, 1/2 inch, and 3/4 inch plywood. If you build cabinets, drawer boxes, built-ins, or shop storage, that saves time at the router table and cuts down on test passes.

Freud built this set to handle more than just plywood. According to the source data, the bits are suitable for hardwood, softwood, plywood, and composite materials. That matters when one project mixes veneered sheet goods, solid face frames, and man-made panels. You can keep the same set on hand for shelf dados, back panel grooves, partition joinery, and other common router work without treating it like a one-material specialty set.

The 1/4 inch shank size makes this set a practical fit for a wide range of routers, especially smaller hand-held routers and many table-mounted router setups. If your shop or truck is already set up around 1/4 inch shank accessories, this Freud plywood router bit set drops right into the workflow. It is also rated for use on both hand-held and table-mounted routers, so you can choose the setup that makes the most sense for the cut, whether that is edge-guided routing on a panel or controlled repeat cuts at a router table.

Freud also adds its Perma-SHIELD coating, which is there for a reason beyond looks. It helps reduce drag and limits pitch buildup, while also protecting the bit body from corrosion. In practical use, that means the bit stays cleaner during repetitive cuts in resin-heavy sheet goods and feeds more smoothly through the material. When you are making multiple cabinet parts in one session, anything that helps the cut stay consistent is worth having.

This set includes a wooden shadowbox case, which is more useful than it sounds. Router bits tend to get tossed in drawers, chip at the cutting edge, or disappear into mixed accessory bins. A dedicated case keeps the bits organized, protected, and easy to grab when you need the right plywood size fast. For anyone doing repeat cabinet or built-in work, that kind of organization saves frustration and helps protect the cutting edges between jobs.

If you build with sheet goods regularly, this is the kind of set that solves a very specific problem well. It is a strong fit for cabinetry, furniture building, closet systems, built-ins, shelving, and general woodworking where plywood joinery needs to be clean and snug. If you only route the occasional groove once a year, a standard straight bit may be enough. If plywood joinery is part of your regular work, the right undersized bits are the smarter buy.

Freud 89-660 3 Piece Undersized Plywood Router Bit Set for Cabinet Work That Fits Right

This is one of those small specialty sets that earns its keep fast if you work with plywood on a regular basis.

• Who it's for: Cabinetmakers, trim carpenters, furniture builders, and shop users who cut a lot of grooves and dadoes in plywood or composite panels.
• Why it stands out: It solves the real-world undersized plywood problem with dedicated bit sizing, a 1/4 inch shank that fits common routers, and a protective case that keeps the set organized.
• Worth knowing: This is a purpose-built set. If plywood joinery is part of your normal workflow, it is a smart buy. If not, a standard straight bit may cover occasional use.

• What is this set designed to cut? It is designed to rout perfectly fitted grooves and dadoes for today's undersized plywood panels.
• Will it work in a router table? Yes. The source data states it is suitable for both hand-held and table-mounted routers.
• What materials can these router bits cut? They are listed for hardwood, softwood, plywood, and composite materials.
• What shank size do these bits use? This set uses a 1/4 inch shank.