Wannan kayan aiki ne manufa domin kau da datti wanda za a iya bar a kan ciki ganuwar casing, kamar m ciminti, wuya kakin zuma, daban-daban gishiri lu'ulu'u ko adibas, perforation burrs, baƙin ƙarfe oxideresidues sakamakon rusting, don haka kamar yadda ya sa duk saukar da rami kayan aikin. wuce ba tare da toshewa ba.Musamman lokacin da ƙaramin madauwari ke samuwa tsakanin kayan aikin ramin ƙasa da murɗa cikin diamita, cikakken gogewa ya zama dole kafin a ci gaba da aiki. A halin yanzu, a cikin babban rijiyar mai, toshe katangar ciki na rumbun, ta hanyar amfani da juzu'i, matakin da ya dace.