For builders that require rough angle turning and fine tuning adjustments. This instrument has clamps and tangents that bring your instrument quickly on target. 15 minute horizontal circle. Unit uses 5/8 x 11 thread. Features:Non-strip focus knob prevents breakage and lens damage Built-in sunshade reduces glare Large achromatic coated objective lens for a sharp image Rubber eyepiece cap protects eyeglasses Durable brass leveling screws Dust protected eyepiece with fixed cross hairs for accuracy High precision glass level vials 4-1/2 foot (1.4m) short focus for maximum usable range One piece aircraft aluminum telescope Electrostatically powder coated safety yellow paint One Year Warranty Working Range: 200 feet (61M) Accuracy: 1/4-in at 100 feet Includes:Level Model 54-190 and Hard Carrying Case, Tripod Model 60-ALQCI21, Aluminum Leveling Rod Model 06-808C (8 Foot in Feet/Inches/8ths), Allen wrench.