3mbjts,
I think Jim is right the 35mm bits are for boring machines not routers. A boring machine is much lower rpm than a router.
http://www.whitesiderouterbits.com/catalog.html#catimgs look under "Boring Bits"
The page shows righthand and lefthand cutting. They probably have a hollow threaded section in the end of the shaft and a flat on the shank so you can screw them on to the threaded male spindle of the boring machine. Hollow shank and flats on the side, not a good combo in a high speed router. Catalogue says for drill press or boring machine only.
Mike
It is weird that they have them listed with router bits ???