Starrett Stargett, nekukurumidza kutema kucheka korona, yero, ø 20 mm FCH020
Iyo itsva yekukurumidza kucheka korona inogadzirwa yakagadzirwa neiyo nyowani nyeredzi simbi. Kupfeka kukuru uye kupisa kupokana pamwe neiyo nyowani yekugadzira zino, bvumira kupfava uye nekukurumidza kucheka chiito mune dzakasiyana siyana zvinhu. Kunyanya yakaratidza simbi yesimbi uye yakatemwa simbi, iyo itsva yekukurumidza kucheka korona inoita kuti kutemwa mumakona materu kusvika gumi nematanhatu. Mazino Anogara 41 mm kutema kudzika kwakadzika.