A zuciyar wannan injin haƙa rami mai ƙirƙira ita ce hannun dutsen kaiyuanzhichuang.
Kaiyuan Rock Arm, a matsayin wani hannu da aka gyara da aka yi wa gyare-gyare da yawa, ya dace da haƙar ma'adinai ba tare da fashewa ba, kamar haƙar kwal a buɗe, haƙar aluminum, haƙar phosphate, haƙar zinare ta yashi, haƙar quartz, da sauransu. Haka kuma ya dace da haƙar duwatsu da aka samu a cikin gine-gine na asali kamar gina hanya da haƙar ginshiki, kamar yumbu mai tauri, dutse mai laushi, shale, dutse, dutse mai laushi, dutse mai yashi, da sauransu. Yana da kyawawan tasiri, ƙarfin kayan aiki mai yawa, ƙarancin gazawar aiki, ingantaccen amfani da makamashi idan aka kwatanta da guduma masu fashewa, da ƙarancin hayaniya. Rock Arm shine zaɓi na farko don kayan aiki ba tare da yanayin fashewa ba.
