I've always thought it a bit odd that woodturners buy wooden handles when they're so easy to turn, though I know that many these days tend to use metal quick release handles with tools that are sharpened a each end. Leastways, most demonstrators seem to.
I made my own set of three carbide tipped tools in early 2021 with tips bought off eBay, such as these from a UK supplier. Two each of round, square and diamond, with six screws:
https://www.ebay.co.uk/itm/38758395...5338365712&toolid=20006&customid=EB282390825&
I bought three 300mm lengths of bright mild steel ('BMS') square section bar, ground one end to round to fit into the handle, then shaped the other end to accept the TC cutter, and drilled and tapped a hole to screw the cutter to the bar. To accommodate the diamond-shaped cutter, I cut a slice along the 'business end' of the square bar to make a 'V' shaped notch in it, then brazed it back onto the bar. In pics 4 & 5 below, you'll see the brazing line. Over the years, I've mostly used beech for handles - often discount store rolling pins, but I had some pieces of spalted beech which I used for the carbide tipped tools.
I've found the square tipped tool especially good for pen turning. I found the diamond tool least useful, mainly for scoring the rings of the handles, or little bowls, which I scorch with piano wire.
Some (not very good!), pics attached.
The last pic is of a lathe steady which I made as a 'lockdown project' when we were all under 'house arrest'.
Hope that's of interest.
David.