Isikrufu esikhululekileyo samkela uyilo lokongeza isikrufu esincinci sedayamitha. Ngale screw encinci ye-diameter, izikhonkwane zinokudityaniswa kwikhonkco, ziqinisekise ukuba aziwi lula. Ngokungafani nezikrufu eziqhelekileyo, i-screw evulekileyo ayixhomekeke kwisakhiwo se-screw ngokwayo ukukhusela ukuwa, kodwa iqonda umsebenzi wokuthintela ukuwa ngokusebenzisa isakhiwo sokukhwelana kunye nenxalenye edibeneyo.
Xa i-screws ifakwe, i-screw encinci ye-diameter ihlanjululwe kunye nemingxuma yokunyuka yeqhekeza elidibeneyo ukwenza uxhulumaniso oluqinileyo. Olu luyilo lwandisa kakhulu ukuqina kunye nokuthembeka koqhagamshelo, nokuba luphantsi kwee-vibrations zangaphandle okanye imithwalo enzima.