【Combination Lock Security】 Features a 3-digit combination lock with 1,000+ possible codes – no keys required. Easily reset the combination to help protect your mail. Suitable for homes, offices or schools. 【Robust Steel Construction】 Made from sturdy steel with protective coating to resist scratches and weathering. Designed for long-lasting outdoor use on walls. Sloped Top & Noise Reduction The 25° sloped top effectively sheds rainwater away from the mailbox body. Integrated sound-dampening pads eliminate operational rattling while maintaining structural stability. 【Three Viewing Windows】 Equipped with three 4x4 cm windows to conveniently check incoming mail without opening the box. Modern appearance for home or office exteriors. 【Simple Wall Installation】 Includes mounting hardware for solid walls (brick/concrete) with straightforward instructions. Suitable for use as a mail collection box, donation box or suggestion box.