???4-DIGIT COMBINATION???This 4-digit combination lock offers 10,000 combo, which means it is 10 times safer than 3-digit lock, providing 10 times more security for lockers & gates & valuables. Updated patented internal mechanisms, 8-10 times stronger than original ones, won't rust or freeze up even after years of use. ???UNBREAKABLE LOCK FOR SECURITY???This waterproof padlock has super resistance to rust and corrosion thanks to the carefully zinc coated zinc alloy lock body and 1/4in sturdy hardened steel shackle, the shackle can afford up to 300lbs with extra cutting & sawing resistance and hardly damaged by human force. ???VERSATILE LOCK FOR ALL SITUATIONS???Features solidly built construction and side windows for easy combination viewing, convenient to store and carry. The hardened steel shackle is suitable for all standard sized lock holes on the market, perfect for locking gun case, Gym, School, Employee Locker, Hasp, Fence, Storage, Chest, Gate, Cabinet, Toolbox, ect. ???EASY SETTING KEYLESS DIAL???The numeric combination design is easy to set and reset your own combination, 4-step easy setting, unlock first, rotate the shackle for 90?? counterclockwise, press down the shackle to make the small hook on the bottom of the shackle enter into the hole, rotate another 45?? counterclockwise to hold on, set new combination. ???NO RISK PURCHASE???This resettable lock is waterproof, can be used for outdoor situation. Comes with 90-day refund guarantee and friendly customer service. We take care of all quality-related issues with a replacement or refund. If you have any problem with the product, please contact us.