I bought this saw to cut holes in plaster and batten walls for 13:1 speaker wire routing. The cutting element of this hole saw is efficient enough to get a clean cut, but: there is a hard plastic guide as there is no pilot crown yet, again, as I understand it, the concern cares about outfitting their design department with sheepskin, not with People from the school of practical common sense. The supplied instructions are quite small in all dimensions. The only way I've found to make it workβ¦