The OFK500 doesn't use 'normal' router bits, only special ones, but there are a few available. There's the flush trimming bit, chamfer bit (45 degree), and then radius bits from 2mm up to 6mm in 1mm increments.
The cutters are only produced by Festool.
They don't come cheap at around €76-89 incl. VAT.
Of course they can be changed because there are around 9 models.
There is a screw in the center of the hollow axis which disconnects the router bits.
The OFK500 doesn't use 'normal' router bits, only special ones, but there are a few available. There's the flush trimming bit, chamfer bit (45 degree), and then radius bits from 2mm up to 6mm in 1mm increments.
Think it comes with one cutter .So I will order one each of the others .Because if I don't get them with it I probably won't .Then it will be less usefull