Made here in the UK.
Made from En8 grade steel and manufactured to a tolerance of 0.02 these bushes will not only be accurate but last a lot longer too.
The TBC option is designed with a 60 degree bore, an extended length of the smaller diameter and a 6.3mm hole for mandrel use. These bushes are made with TBC pen turning in mind.
To Turn Between Center all you need is a 60 degree dDad centre to fit in your Head stock and a 60 degree Live centre to fit in your Tail-stock.