The Brunton 5009 GEO Pocket Transit is the latest addition to Brunton industry-standard line of pocket transits, legendary for accuracy, durability and simplicity. New features include an adjustable needle locking mechanism, a hinge inclinometer, two long-level bubbles, a cover hinge assembly designed for increased durability and 'Buck Horn' style sights for increased accuracy. Adjustable needle locking mechanism with two positions: Unlocked - releases the needle for azimuth readings. Locked - momentary release of the needle for strike measurements by pressing and holding the release mechanism, then lock the needle for reading by releasing the machanism. Brunton's commitment to their roots continues with the GEO, the newest and most advanced transit built. Listening to owners of their pocket transits, and implementing some of their ideas, Brunton has created the ultimate tool for professionals. Features: 0-90° Quads Leather case Single NdFeB magnet resists demagnetization Azimuth accuracy ±1/2° with 1° graduations Vertical accuracy ±1/2° with 1° graduations and 10 minute readability Vertical angle measurements to ±90° or 100% grade A percent grade scale with increments of 5% Induction damped needle for quick, accurate readings Sapphire jewel bearing allows for smooth needle movement Magnetic declination adjustment allows for east or west declination setting to 180° Short and long sights for increased accuracy when sighting azimuth or vertical angles Precision aligned mirror with convenient "see through" sighting capability Composite body material is permanently impregnated with color O-rings make the Com-Pro waterproof for increased reliability One year warranty Specifications Dimensions:   3.625" W x 2.813" H x 1.313" D Weight:   10.4 oz.