Tsarin fuskar ƙarshen yanke na tef ɗin zafi mai zafi na PTFE kai tsaye yana shafar manne da ɗagawa a lokacin aikace-aikacen. Rarrashin tsagawa (rauni mara kyau, kusurwa mara kyau) yana haifar da filaments na manne, yana ɓatar da gefen gefen gefe, kuma yana fallasa burbushin fiberglass - yana haifar da zub da jini, haɗin gwiwa mai rauni, da ɗagawa ƙarƙashin zafi ko tashin hankali. Fuskokin ƙarshen da ba bisa ka'ida ba (wavy, protruding) suna haifar da rarrabawar matsatsi mara daidaituwa, tuƙi mai ɗaci yayin ajiya. Maƙasudin ƙarshen fuska yana da santsi, ƙwanƙwasa, kuma ba tare da lalacewa ba - yana aiki azaman hatimi wanda ke kulle manne kuma yana tabbatar da cikakken haɗin kai.