These are an inexpensive way of turning the tenon and drilling the mortise and squaring the shank. If you don't have a metal lathe or special equipment designed for the job, these are quite adequate, with a bit of fussing. The tenon turning tool mounts on a drill press or a hand drill secured in a vise. A guide pin inserts into the stem bore (drill the bore out first if neccessary to get an easy fit) and the cutter revolves around the tenon, turning it. It is adjustable from less than 1/4" to over 3/8". The combination mortise drill and shank-end square drills a 5/16" mortise to adjustable depths, and squares the shank-end in the same process.
You may have fuss at times to get a good gap-free stem to shank fit, but it does work, and it'll allow you to create pipes until a metal lathe shows up at your workshop

PIMO's price is $64.95 USD for the tenon turning tool and $29.95 for the combo mortise and square tool. I'll sell them both for $40 USD. They are in good shape. I used them for maybe 30 pipes. The carbide cutter is still sharp, and has two sides that haven't been used at all (it rotates to a new cutter edge). Both peices come with allen keys for adjustments, and full instructions for use.
If anyone is interested, email me or post here, and I'll send you a PayPal invoice and get them off to you right away.
Cheers,
John