Specification: Materials: zinc alloy and steel shackle Dimention: Lock Body with shackle: 1.1*0.47*2.6 in Weight: 0.19lb Advantage: 1. 0-0-0-0 is the default combination, you can hassle-free set and reset your own combination. 2. You don't have to worry about losing keys as they are number locked not require a key. 3. 10,000 combinations and take 10 times longer to crack than 3-digit locks. How to set combination code: 1 Hold the combination lock to make sure the 4-digit numbers show on the right. 2 Make sure the code is set to default (0-0-0-0). Pull up the shackle, turn the shackle 90 degrees counter-clockwise, press the shackle down and continue to turn another 90 degree counter-clockwise. 3 Then set your own new combination. Turn the shackle back as normal. Remember to check if numbers are line up before locking.
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