1/2" idrayivu engu-17, 19 kanye no-21mm amasokhethi anomthelela ojulile angu-6 amaphoyinti, i-metric. Yamantongomane angamasondo. Yenziwe nge-chrome molybdenum nezifakwa ezivikelayo ukuze zisetshenziswe emasondweni e-aluminium. Indawo emnyama. Ihlinzekwa njengesethi yamathathu.