The experts at Bunton used the suggestions and advice from the professionals in the field to make the Geo Pocket Transit Compass the ultimate compass. For fast magnetic-north readings, this compass boasts a demagnetization-resistant NdFeB rare-earth magnet on sapphire jewel suspension. For quick stabilization, it even has an induction-dampened needle and an adjustable needle-locking mechanism. The hinge inclinometer (accurate to 2) allows for simultaneous dip and dip direction measurements, which reduces the number of measurements you need to take. Built for punishing use, the Geo Pocket Transits body is 100% waterproof and its made of 6061-T6 hard-anodized aluminum billet for permanent color and scratch resistance. Exterior adjustable magnetic declination and two long-level bubbles add precision. Precision-aligned mirror with see-through sighting. Centered ball-and-socket tripod mount. Azimuth accuracy is 1/2 with 1 graduations. Vertical angle accuracy is 1/2 with 1 graduations and 10-minute vernier. Vertical angle measurements to 90 or 100% grade. Percent grade scale with 5% increments. Leather case included. Made in USA. 3.8L x 2.8W x 1.3H. Wt: 12.8 oz. Available: Quad Quadrant Graduated Circle. 360 Azimuth Graduated Circle. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Compasses.