Festool 1/4" (6.35 mm) Clamping Collet is a replacement and application-specific router collet for compatible Festool routers. This is a router collet designed for holding 1/4 inch shank router bits securely during routing work. Model number 488761. If you run smaller shank bits in a Festool router that accepts this collet, this part matters because the collet is what keeps the bit centered, locked in place, and cutting clean.

The main job here is straightforward: clamp a 1/4 inch cutter shank properly. That sounds simple, but it has a big effect on cut quality. A good collet helps reduce bit slip, supports better centering, and gives you more predictable routing performance. Festool also notes faster and easier bit changes with one wrench, which is a real convenience when you're moving between profiles, trimming, and edge work.

This collet includes the locking nut, so you are not just buying the inner clamping piece by itself. That matters for users replacing worn components or setting up a second dedicated collet for common bit sizes. Keeping a correct-size collet ready to go can speed up changeovers and help avoid the bad habit of trying to make the wrong collet work with the wrong shank size.

On the practical side, collets are wear items. Over time, repeated tightening cycles, dust, resin, and heat can affect how well they grip a bit. Replacing a tired collet is one of the cheaper ways to restore confidence in your router setup, especially if you have noticed slipping, inconsistent depth, or a bit that no longer feels as secure as it should. For finish routing, template work, and edge profiling, that kind of small upgrade can make a noticeable difference.

Compatibility is the key buying point with this part. Festool lists this collet as suitable for the MFK/OFK 700, MFKC 700, OF 900, OF 1000, OF 1010, OF 1010 R, and KF. It is made for a 1/4" (6.35 mm), cutter shank diameter, so the fit between router bit and collet is explicit. If your work depends on trim bits, small profile bits, or other 1/4 inch shank cutters, this is the size you want.

Who should buy it? Festool router owners who need the correct collet for 1/4 inch bit use, plain and simple. It makes sense for cabinet installers, finish carpenters, trim crews, and serious woodworkers who switch between metric and imperial bit sizes or want a fresh collet to maintain accuracy. It is not a flashy accessory, but it is one of those small parts that directly affects how well the router does its job.

Festool 1/4" (6.35 mm) Clamping Collet is one of those small parts that makes a big difference

If your router is only as good as the bit holding system, then a fresh, correct-size collet is money well spent.

• Who it's for: Festool router owners running 1/4 inch shank bits for trim, cabinet, and finish routing work.
• Why it stands out: It gives you the right 1/4 inch fit, includes the locking nut, and helps keep bit changes quick and clamping more reliable.
• Worth knowing: This is a fit-specific accessory, so compatibility matters more than anything else. Match it to your router model before you buy.

• What bit shank size does this collet accept? It is designed for 1/4" (6.35 mm), router bit shanks.
• Which Festool routers is it listed for? It is listed for MFK/OFK 700, MFKC 700, OF 900, OF 1000, OF 1010, OF 1010 R, and KF.
• Does it include the nut? Yes. This is a clamping collet with locking nut.
• Why replace a router collet? A worn collet can affect grip and consistency. Replacing it can help restore secure bit holding and cleaner routing performance.