Used attached to wooden awl 3 mm, 4 mm, 5 mm. Fitting feeling: If it is Maine Main 4mm 5mm is considered to be the main so there is no problem with mounting. When it was 3 mm, the sharpness fell and it got caught, I felt that it would be misaligned. I think that it is unexpected because it is fixed by metal friction at the cone and the base on which the dish cutting edge is attached. Feeling of use: Since the dish can be instantly engraved to the full extent of the blade, trial cutting is necessary. Turning to the end can be quite large. I think that there is a preference for dish shape, but it was easy to use. Even when broken, it is economical because it is a general purpose cone that replaces. Good point: Although other dish cones are difficult to select center blades, this can be regarded as a dish attachment.