Sisebenza ngokukhethekileyo ekwenzeni kunye nokubonelela ngoluhlu olubanzi lwe-Tamper Resistant Screw. Ezi zikrufu ziyilelwe ngokukodwa ukubonelela ngokhuseleko olwandisiweyo kwaye zithintele ukuphazamisa okungagunyaziswanga okanye ukufikelela kwizixhobo ezixabisekileyo, oomatshini, okanye iimveliso. Ngoyilo lwazo olulodwa kunye neentloko ezikhethekileyo, isikrufu sethu sokhuseleko sem3 sibonelela ngokhuseleko oluthembekileyo ngokuchasene nokonakaliswa, ubusela, kunye nokuphazamisa.