With the Festool 491385 D19X6X6 ball bearing guides, you smoothly and accurately guide your router cutter along any workpiece edge or template. Worn bearings can quickly lead to burn marks or uneven cuts, but this two-piece set instantly restores flawless guidance to your tool. Crafted from durable high-grade steel, these precision bearings feature an outer diameter of 19 mm, an inner bore of 6 mm, and a width of 6 mm. Thanks to the included M6 nut, you can quickly mount the replacement bearing onto compatible Festool cutters, such as the hw S8 D19/20WM Z2 and hw S8 D19 12X12 kl OFK, ensuring clean trimming results without damaging the wood.