►不鏽鋼材質
►光面處理
►刻度處理：蝕刻
►底座碳鋼材質
►角度誤差：90°±0.2°
►Long handle parts graduation process use etching both sides with stainless steel.
►Short handle parts electroplate with carbon steel.
►Surface treatment:polished finish
►Test standard:90°±0.2°