Veritas 帝國錐形密合塞孔刀

The tapered cut means the plug sides come out glass-smooth instead of chattering, and the invisible fit line really does disappear once you glue it up. Resharpening instructions are a thoughtful touch, too.

The fit line on these is genuinely almost invisible—I had to run my finger over the plug to find it. The tapered shaving action makes a huge difference in how clean the cut comes out.

The tapered cutting action leaves such a clean edge that I barely had to sand the plugs before installing them—the fit line pretty much disappears. I've used three sizes so far and each one came out smooth right off the cutter, and having the resharpening guide handy is a nice bonus.