These Brass Nautical Compasses are a working navigational instrument designed to align themselves with the Earth's magnetic field. They use a needle to indicate the direction of North, and prove to be very handy when in the wilderness or out at sea. This beautiful brass compass is approximately 2" in diameter, perfect size for your pocket. Never get lost on a hiking trip or sailing, or use it as a collector's item in your house or office. A unique and practical nautical gift.