Fangrui Product Details Versatile Use: This Indoor And Outdoor Padlock Is As A School Locker Lock, Gym Lock, And Gate Lock, Offering Robust Protection And Security Against Theft. Ensure To Measure Your Doors Backset, Cross Bore, And Thickness To Guarantee A Fit. Personalized Security: Set Your Own Four-digit Combination With Ease For Quick Recall. A Combination Change Tool Is Included, Making It Simple To Reset Your Code Whenever Necessary For Enhanced Security. Durable Construction: Crafted With A Solid Body For Superior Strength And Weather Resistance, This Combo Lock Features A Hardened Steel Shackle Designed To Resist Cutting, Ensuring Your Belongings Stay Secure In Various Conditions. Optimal Dimensions: The Lock Sports A 2 Inch (51 Millimeter) Wide Body And A 5/16 Inch (8 Millimeter) Diameter Shackle With 1 Inch (25 Millimeter) Length And Width, Providing A Balance Of Usability And Security For A Range Of Applications. User-friendly Setup: The Shackle Is Preset To Open On 0-0-0-0. Contrary To Some Instruct