These keys are made of zinc alloy, lightweight and easy to carry, simple to use. The key can be used for doors and windows on trains, cars, elevators, subways, electronic control cabinets, electric meter boxes, marine applications, and meter locks (magnetic type). Features: - Color: Silver - Material: Zinc alloy - Size: 8.40 x 4.50 x 0.80 cm / 3.30 x 1.77 x 0.31 inch - Made of zinc alloy with metallic paint finish, sturdy and durable - Compact design, convenient for storage and portability - Lightweight with a sleek appearance, practical for everyday use - This set includes various key styles suitable for common electrical, cabinet, and faucet applications, offering a practical solution for daily needs - Fine workmanship and functional design enhance usability and reliability Packing list: 4 x keys