Easy to Use: Setting or Resetting is easy following the instructions which are always included. Large numbers and the side window design make it clear and effortless to lock and unlock in daily use. Sturdy Construction: The heavy duty combianation locks come with high strength zinc alloy bodies, hardened steel shackles and excellent caftmanship. They are weatherproof, anti-rust and resistant to cutting and sawing. They are designed to be the most durable dial combination locks for you.