Two tools in regular use in our studio.
On top you see my favourite, the bamboo stick with the Varja on top.
Of course the whole front part with the bamboo and the needlehead is disposable single use only.
The skull- staff is Patricias Irezumi tool, also with disposable tip single use only.
The tools were built by Erik Raudhi https://www.facebook.com/rockngold and I helped a little bit...;)