Torne Lignum kits, and I’m pleased with the kit itself. It uses the same drill bit as some off the other stoppers I have made, so no additional investment needed there. It was able to fit on my previously-purchased mandrel, as well. I believe that making stoppers would be considerably easier with a tap to thread the wood after drilling, but I prefer my current ‘screw onto the headstock’ mandrel over one that has a morse taper. (TL has a MT2 mandrel that is also a tap.) My drill chuck (which has a morse taper) tends to pop out at times with any pressure at all being exerted towards the tailstock. I don’t want to deal with that on my bottle stopper mandrel as well. It is easy enough to solve with some all thread, a washer, and a nut, but why bother? What I have works, so I’ll keep using it.