Doc, I like the handles on the spanners. I've turned a great many spindles with tenons sized using spanner gauges, but find it easier and quicker to use them without a cutting edge. I use a 9 mm wide parting tool and keep cutting till the spanner slips over. It seems easier to me, because you don't have to sharpen the spanner and you can't make a mistake and cut too deeply. If I lost contact with the non-cutting part of the spanner under the tenon, the edge would keep on cutting and the tenon was then under size. And you don't have to sacrifice the spanner, you can still use it for spannering,