Knut, they maybe too big. The ones I use are 50 mm dia. on ebay, but one side of the mounting spigot has to be reduced to 9.5 mm diameter. If only Proxxon had made the KG & FET to use the same blades. I never thought to try the FET blades as I assumed they would not fit, & I did have the 50 mm ones.@Stuart Little, my problem is that the saw blades that came with the saw break/break easily, so I will try metal blades of the type that I use on my Prooxon FET saw, changing the saw blade itself is not a problem, Thanks for your attention, greetings Knut-
Stuart