Unyolo wa Cast cast umapangidwa pogwiritsa ntchito maulalo oponyedwa ndi zikhomo zachitsulo zochizira kutentha. Amapangidwa ndi zilolezo zokulirapo pang'ono zomwe zimalola kuti zinthuzo zizigwira ntchito mosavuta kuchokera pamgwirizano wa unyolo. Unyolo woponya amagwiritsidwa ntchito m'njira zosiyanasiyana monga kuthira zimbudzi, kusefa kwamadzi, kunyamula feteleza, kukonza shuga ndi kutumiza nkhuni zonyansa. Amapezeka mosavuta ndi zomata.