Kumenyekanisha ibyokurya byacu byiza kandi byujuje ubuziranenge hamwe na Knob, bikozwe mubikoresho byiza bya zinc.Iyi ntoki nziza cyane yerekana ubwiza nubwiza, ikongeraho gukoraho ubwami kumuryango uwo ariwo wose.
Kumenyekanisha ibintu byiza kandi byiza byo mu bwoko bwa Panel Ball, bikozwe mubintu byiza bya zinc alloy.Iyi ntoki nziza cyane yerekana ubwiza nubwiza, ikongeraho gukoraho ubwami kumuryango uwo ariwo wose.