Outdoor & Indoor Use combination lock is designed for indoor and outdoor use such as gym / sports/ school & staff lockers, gate, shed, storage, cabinets, toolbox, doors, large luggage bags etc(br) So anywhere you need a lock that's OK 4 Digit Combination Lock Unlike 3 digit combination, it provides 10000 code combinations which is harder and safer than the previous version(br) In addition, the latch of this lock is strong enough that can't be removed or cracked by human force(br) You needn't worry the security any more High Quality & Weatherproof This combination lock is made of zinc alloy which is anti-rust and weather-resistant(br) It has medium size and suitable weight about 99 g (each one)but maybe a little big size to lock suitcase (if you don't mind that's ok ) It is so portable that you can use in many places without worrying quality Easy to Use The original password is 0000(br) Every combination padlock is equipped with clear instructions in the envelop bag(br)Setting or redefining your own combination is simple and easy to operate(br) Not complicated at all