Would prefer the stamps theming. The multi tool tech themed pen came with membership together with a long quality tape steel measure etc a few months ago from Supercheap Auto members card 5.00 dollars AU. It uses the short expensive refill. Anyway yes they are handy but not a kit to make. When the membership drive finished I bought quite a few dirt cheap for the replacement biro in them. Yes the measure markings suit pen makers, the biro writes so well,my version also had screwdrivers etc.
Peter.