Heavy Duty Indoor Outdoor Large Padlock. This large heavy-duty padlock features a one-piece lock body, 304 stainless steel locking shackle, 52mm wide lock body, 8mm diameter shackle, and weighs 270g. Designed for maximum security, this combination lock is suitable for indoor and outdoor use on gates, garages, sheds, fences, storage units, school lockers, gyms, and office cabinets, providing reliable protection against theft. High-quality weatherproof and waterproof combination padlock constructed from high-strength zinc alloy for rust resistance and durability in harsh weather conditions. The lock features a reinforced zinc body with protective bumper for added strength and reliability, along with a hardened 304 stainless steel shackle that resists cutting and tampering. Tested for over 180 hours in a salt spray environment to ensure long-term corrosion resistance. Four-digit combination mechanism offers 10,000 possible combinations, providing enhanced security compared to 3-digit models. The lock includes 4-position metal code wheels and a tamper-resistant design that prevents the shackle from being removed or forced open under normal physical stress. One-touch locking mechanism allows for easy operation. After entering the correct combination, press the center button to release the shackle quickly and securely. Hidden reset design with password located at the bottom of the lock enhances privacy and prevents accidental resetting. To change the combination, remove the screw, slide the internal setting lever to the SET position, and follow the reset instructions. This feature helps prevent lockout due to unintended code changes.