Udidi lwe-Addith screw lubandakanya ikakhulu izikrufu zefanitshala, izikrufu zomthi, izikrufu zeChipboard, njl. njl. Isikrufu sethu senziwe ngentsimbi yeprimiyamu kwaye sisebenzisa unyango olunomphezulu olwenziwe ngamagala, akukho lula ukurusa, lumelana nomhlwa kwaye luhlala ixesha elide. Ukusetyenziswa kwezinto eziphezulu zetsimbi, umsebenzi omhle emva kokucima unyango, ubunzima obukhulu, amandla aphezulu. Umsonto unzulu, umgama phakathi komsantsa unokuba wenze amandla alinganayo, ukutshixa kukhuselekile ngakumbi, akukho lula ukuwa xa usebenzisa.