Durable construction with ABS case, zinc alloy body and hardened steel shackle, offering rust resistance, water resistance and cut resistance. Tested under salt spray for 100 hours, suitable for harsh conditions. 4-digit combination provides 10,000 possible codes, with advanced error-proof revision tool for easy combination redefinition. Compact size: 4.09*1.9*0.78 inches, weighs 215 grams, easy to store and carry. No need for keys, large numbers ensure easy readability. Multi-functional for indoor and outdoor use: ideal for gym lockers, doors, cabinets, windows, wardrobes, fences, chains, sheds, storage rooms, garages, tool boxes, luggage, schools, staff lockers. Note: Shackle diameter 8mm, ensure keyhole over 8mm. Color as shown in the picture. Please allow small size error due to manual measurement. Monitors may cause slight color difference, please refer to the real object.