Industrial and commercial padlocks manufactured in-house by Zhongshan Yue-fong Mai’s Manufacture Co., Ltd. Laminated, combination and smart padlocks in brass, laminated steel and hardened alloy, with shackle options from 20 mm to 100 mm. Salt-spray tested 120–240 hours to ASTM B117 / ISO 9227. OEM/ODM with keyed-alike, master key and custom logo services for distributors worldwide.