If you're actually plugging holes with the plugs you make, the other thing to look for is a plug cutter that cuts a slightly tapered plug. The taper ensures tha

If you're actually plugging holes with the plugs you make, the other thing to look for is a plug cutter that cuts a slightly tapered plug. The taper ensures that the plug will fill the hole even if it's drilled slightly undersized or (more commonly) slightly oversized. Beware that if you're driving a tapered plug into a hole near the edge of a board, you can split the board. Now you have two problems, as they say. What other use would a plug cutter have besides cutting plugs for filling holes? Cutting cylindrical tenons. For that application, you'd want one that cuts straight-sided plugs. Unless you're cutting tapered mortises too, of course, in which case you want the tapers to match. It turns out that you can also use plug cutters without the center spur in a handheld drill to cut cylindrical tenons if you taper the end of the stick so that the plug cutter rides the taper onto the end of the stick. I wouldn't try this with a cutter with four spurs, but the single spur ones apparently do quite well: https://blog.lostartpress.com/2022/02/24/chairmaking-on-the-cheaper-part-1/ https://blog.lostartpress.com/2022/02/24/chairmaking-on-the-...