Red Hound Auto 2-3/4" 70mm Stainless Disc Padlock Shackle Trailer Self Storage Single Lock with 2 Keys Heavy duty premium circular disc padlock with 2 keys Constructed of heavy duty corrosion resistant stainless steel Diameter of lock is approximately 2-3/4" (70mm); opening under bolt is approximately 3/4" Resists sawing or cutting with its stainless steel body and hardened steel shackle Note: If you order multiple quantities of locks from this specific listing, we will make sure to send you locks that are all keyed alike (all keys will work with all locks)