Sealey 15 piece metric re threader kit sealey ak310 taps and dies are suitable for chasing out damaged threads and the removal of nicks and burrs without undercutting good threads use with a standard spanner and a little light oil thread file restores damaged external threads on any diameter right or left hand just select correct pitch ideal for restoration work supplied in tool tray sealey ak310 re threader kit 15pc metric