I have a set from Lee Valley, they work well.
Different brands have different profiles. My Lee Valleys have a bit of a rounded shoulder. Others are more cone shaped. Some even have countersink drills so you can hide more of the shoulder cut.
If you can assemble with the moisture content of your tenon lower than your mortised piece, shrinkage will really lock them together. But that's tough to do.
When I assembled beds and railings a big pile of ratchet straps and a rubber mallet were the main tools.
Justin Pierce, aka spalted
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