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ER collet: ER8 collet, ER11 collet, ER16 collet, ER20 collet, ER25 collet, ER32 collet, ER40 collet, ER50 collet. The collet is also called collet, cable nozzle, ER circlip, elastic collet, spring collet, machine tool collet, etc. OZ series collets: OZ6, OZ8, OZ10, OZ12, OZ16, OZ20, OZ25, OZ32, among which OZ25 and OZ32 are commonly used. SC series chucks, also called straight shank chucks: SC16, SC20, SC22, SC25, SC32, etc., among which SC32 is commonly used.