1. Babban maɓalli mai sauƙi.Babban maɓalli ba zai makale tsakanin yatsan ku ba, kuma sautin yana ƙullun lokacin da kuka danna shi a hankali.
2. Manganese karfe stamping.Jikin kararrawa yana samuwa ta hanyar buga farantin karfe na manganese, wanda yake da kauri kuma mai dorewa, ba shi da sauƙi ga tsatsa, kuma yana da lahani mai kyau.3Fuskar fentin.Ana amfani da varnish mai yin burodi don buga alamu a saman, wanda ba shi da sauƙi don bushewa da tsatsa, kuma yana da babban sheki.