I've been cutting some threads in brass lately and was pleased with the results. The tool (that came with the lathe). The results. But I now want to try with internal and external inserts on harder steel but am not sure which tools to buy. I think these will allow me to cut metric threads which is all I will need. Banggood a bit more expensive than ebay, but are they any better? External cutter. ~£16 https://uk.banggood.com/SER1212H16-...uhPxPKKdLqaYRGBoCDd8QAvD_BwE&cur_warehouse=CN ~£12 https://www.ebay.co.uk/itm/SER1212H...081376?hash=item263de391a0:g:-40AAOSwtbBe6Iqw Internal cutter. ~£17 https://uk.banggood.com/SNR0010K11-...l?rmmds=search&cur_warehouse=CN#jsReviewsWrap ~£10 https://www.ebay.co.uk/itm/SNR0010K...016809?hash=item4b778909a9:g:34YAAOSwLNtejDZt This is just for hobby use so I don't need "pro" quality, any thoughts.