U型鎖 High security(高安全性) 型號:MT-3029 解說: • 鎖勾 – 熱處理合金鋼 • 鎖體 – 熱處理硬化鋼 • 附防塵蓋 Shackle - hardened alloy steel. Barrel - hardened steel. Dust cover protecting cylinder from rusting.