3 Pack Combination Lock for School Gym Locker, Gate, Yard Premium Quality The combination lock is made of high-quality zinc alloy, waterproof and rust-proof, the diameter of the padlock beam is 6mm, which is strong and resistant to cutting. The lock numbers feature a design to be suitable for both left and right handed users. How To Use Step 1-Set the default code (0-0-0-0) and pull up the shackle. Step 2-Turn the shackle about 90 degrees to the code setting gap. Step 3-Push it down until the tiny pin is fully inside the gap. Step 4-Keep it in place and turn about 90 degrees again. Step 5-Scroll the number to set your own code. Step 6-Turn back the shackle until it pops up. Durable Material & Excellent Design The combination lock has cast metal body, it has antirust, waterproof, cut-resistance function because of the hardened zinc alloy and plated steel material, which reduce the possibility of hammering, sawing or prying to open. Note Tip 1.Before purchasing the lock, please make sure the thing you want to lock which lock hole is bigger than 1/4". 2.After setting the password, you need to lock it first and then scramble the password. High Security 4 digit combination lock , offers a extra level of security with 10000 combinations, safer than 3 digit combination lock. Sturdy and Durable This durable lock is also waterproof. It can easily be used outdoors on gates, fences, storage units, sheds, meters and is rust free. Widely Use Suitable for school gym locker, sports locker, fence, toolbox, case, hasp storage and etc.