The bushings for hand broaches won't work well on a Davis. The large round plate clamps a given size bushing/guide to the table. You don't need a bushing for every size bore, as the bushing really guides and centers the broach to the table slot. The plate is nothing special. The broaches are not typical hand broaches. Suppose you could make an adapter to clamp them on a shank, but the broaches for a Davis have a hole that allows anchoring the end of the broach in the sliding head on the machine, and I'm not sure how a well a hand broach with taper ground into it would work. Dumont does make broaches specific for Davis machines.