Intsimbi ejikelezayo ihlelwa njengeshushu esongwayo, ikhutshiwe kwaye ibandayo.Intsimbi ejikelezileyo eshushu yi-5.5-250 mm ngobukhulu.Phakathi kwazo: i-5.5-25 mm encinci yentsimbi ejikelezayo ubukhulu becala ukuya kuluhlu oluthe tye kwiingxowa zokubonelela, ezisetyenziswa ngokuqhelekileyo ukuqinisa imivalo, iibholithi kunye neendawo ezahlukeneyo zoomatshini;Intsimbi ejikelezileyo inkulu kune-25 mm, isetyenziswa ikakhulu ekwenziweni kwamalungu omatshini, umbhobho wentsimbi ongenamthungo ongenanto, njl.