No other gun blue liquid will give such professional results. Ideal for the amateur under cold conditions. For re-blueing trigger guards, top levers or even complete barrels.
Surprisingly accurate at this price point. Was not expecting this to be 100% accurate and it isn't but it is pretty close. It fits the barrel and I can close the action fully which is not often the case. When in the barrel I rotated it until the spot was in line with the beads then scratched a mark on the back for the top so that I can get it right straight away in future. Would recommend.