The Festool 491666 edge trimming cutter is a carbide router bit made for flush trimming edge material in woodworking. This is a router bit designed for flush trimming of edges on panels and finished workpieces. Model Number 491666. It is a solid fit for cabinet work, shop-built furniture, and detail trimming where a clean edge matters more than brute force.

This cutter is built around a short cylinder profile with a 3/4 inch diameter and a 9/16 inch cutting length. In practical terms, that makes it well suited for trimming thin edge material and overhangs without getting too aggressive. Festool rates it for edges up to 15 mm thick, which is right in the range for common edge banding and similar finish work.

The cutting edges are carbide, and that matters because this is the kind of accessory that gets judged by cut quality and how long it stays sharp. Carbide holds up better than basic steel in repeated production trimming, especially when you are working through sheet goods, veneered panels, or hardwood edge details. The result is a bit that is meant to stay useful, not disposable.

Festool lists this edge trimming cutter as suitable for the OF 1010, OF 1010 R, and MFK 700, with product-specific use tied closely to edge routing and flush trimming tasks. That gives it a clear place in the Festool routing lineup. If you already run one of those routers, this accessory is aimed at adding a dedicated, purpose-built trimming option rather than asking a general-purpose bit to do specialty work.

Physically, the bit has an overall length of about 1-3/4 inches and an 8 mm shank. That combination keeps the profile compact and controlled, which is what you want when following an edge closely. A smaller, purpose-built edge trimming cutter is easier to manage on fine work than a taller bit that puts more cutting edge in contact than the job actually needs.

Who should buy it? Woodworkers, cabinet installers, finish carpenters, and Festool router users who want a dedicated flush trim router bit for edge work. If your work involves cleaning up proud edging, trimming applied material flush, or dialing in finished panel edges with an MFK 700 or OF 1010 series router, this bit makes sense. If you need a general joinery bit or a large-profile shaping bit, this is not that tool. It is a specialty cutter, and that is exactly why it earns its keep.

Festool 491666 Edge Trimming Cutter for Clean, Controlled Finish Work

The Festool 491666 edge trimming cutter is the kind of specialty bit that makes sense when you care about neat flush edges and do not want to fight an oversized cutter.

• Who it's for: Festool router users doing cabinet work, edge banding cleanup, furniture building, and other finish-focused woodworking.
• Why it stands out: It is purpose-built for flush trimming, uses carbide cutting edges, and fits key Festool routers including the MFK 700 and OF 1010 series.
• Worth knowing: This is a dedicated edge trimming router bit with an 8 mm shank, so make sure your router and collet match before you buy.

• What is this bit designed to do? It is designed for flush trimming edges in woodworking applications.
• What routers is it suitable for? Festool lists it as suitable for the OF 1010, OF 1010 R, and MFK 700.
• What is the cutter diameter? The cutter diameter is 3/4 inch, or 19 mm.
• What edge thickness can it handle? It is intended for edges up to 15 mm thick.
• What shank size does it use? It uses an 8 mm shank.