Diamond Needle File Sets: With round plastic handle made with a hard chrome bond long life Diamond Needle File Sets:Can be used on carbide, hardened steel, andceramics, made with a hard chrome bond thatgives a long life and wears extremely well.5 Pcs/setSet include one each of:Round, Half Round, Square, Equaling, Triangle5 Pcs/setSet include one each of: Round, Half Round, Square, Three Square, ...