Tungsten carbide 3 hole slitting blade ndi chida chodulira chomwe chimapangidwa kuti chigwiritsidwe ntchito zosiyanasiyana, kuphatikiza kudula mapepala, kudula nsalu, ndi ntchito zina zodulira molondola. Amapangidwa kuchokera ku tungsten carbide alloy yapamwamba kwambiri yomwe imakhala ndi tungsten, kaboni, vanadium, ndi zitsulo zina zomwe zimapangitsa kuti ikhale yolimba komanso yodula kwambiri.