lu'u-lu'u core rawar soja kayan aiki ne da aka saba amfani da shi wajen sarrafa injina kuma yana taka muhimmiyar rawa wajen samarwa na gaske. An fara amfani da maƙallan ƙira a kan lathes don haƙa ramukan tsakiya don sassan ramin. Kamar yadda aiki da kai ya zama na kowa, ya kamata a yi amfani da shi sosai a cikin kayan aikin CNC masu yawa. Babban aikinsa shine nuna rami na tsakiya don tabbatar da matsayi na sarrafa ramin sashi.