Chimodzi mwazinthu zazikulu zomwe timagulitsa ndikutha kupereka magiya malinga ndi zojambula zamakasitomala athu. Kaya mukufuna ma giya a spur, magiya amphamvu kwambiri, magiya a helical, magiya a herringbone, magiya apawiri helical, ma giya a mphete, ma giya amtundu uliwonse kapena mtundu wina uliwonse wa zida, tili ndi ukadaulo ndi kuthekera kokwaniritsa zomwe mukufuna.