1. High quality-abu, lalacewa-resistant da tsatsa-hujja, dace da benci drills, tapping inji, lantarki drills da sauran inji, kuma za a iya amfani da hannu.
2. Ma'auni na zaren, yanke juriya ya fi ƙanƙara fiye da na yau da kullum, shine zaɓi na sarrafa ramuka, daidaitaccen farar, babu hakora mara kyau, babu burrs.
3. Ƙirar duniya mai murabba'in murabba'i huɗu, ta yin amfani da na'urar tapping ta hannu ko na'urar tapping, dace da sauri
4. Sauƙi don amfani.Slotting a cikin sashin gaba, cire guntu a saman lokaci, ta ramuka da ramukan makafi suna samuwa, kuma ana iya amfani da su don jan karfe ko ƙarfe.