Kuwutsata mbiri ya caster ndi yovuta kwambiri, koma pambuyo anthu anatulukira gudumu, kugwira ndi kusuntha zinthu kukhala sizivuta, koma mawilo ikhoza kuyenda yekha mu mzere wolunjika kusintha malangizo pamene kusuntha zinthu adakali kwambiri zovuta, ndiye anthu anatulukiraPakati polyurethane PU CasterChiwongolero dongosolo, amene ndicho casters kapena casters. Casters anaonekera kwa anthu wolunjika yosangalatsa kwambiri zinthu kubweretsa lothandiza kwambiri zisinthe, osati zovuta kuchita, angachititse ndi malangizo, bwino kwambiri Mwachangu.

Masiku ano ndi kuwuka kwa mafakitale, zipangizo zambiri ayenera kusunthidwa, casters komanso more ambiri mu dziko, pafupifupi zosalekanitsika osiyanasiyana casters moyo. Ndi chitukuko cha sayansi yamakono ndi luso, koposa Mipikisano zinchito ndi mkulu zipangizo magwiritsidwe, casters anakhala chiwalo chofunika kwambiri. Development wa casters apadera kwambiri anapanganso kwa makampani ina.