High Security 4-Digit Combination Lock: 4-digit combination lock offers 10,000 unique combinations and takes ten times longer to decode than a 3-digit combination lock, providing 10 times more security for your locker/luggage/valuables . DURABLE MATERIALS & EXCELLENT DESIGN: The locker combination lock is made with high-quality zinc alloy and stainless steel construction to withstand the wear and tear of daily use and is rust and corrosion resistant. MULTIPLE USES: This padlock with combination is versatile and can be used in a variety of lockers, including gym lockers, school lockers, and athletic lockers. It is also ideal for use on gates, sheds and fences. The lock beam diameter is 7mm. The shackle adopts a buckle design, which is safer and multi-level adjustable. Its compact size and lightweight design make this locker lock with combination easy to carry with you. Easy to use: no keys required. Resetting your own combo is easy and straightforward. You can reset it by following the instructions. The numbers on the combination lock are easy to read and the dial is easy to turn, allowing locking and unlocking in seconds. Includes portfolio changing tools