【Precision Dual-Angle Tuning Range】Built-in precision micrometer head delivers ±4.1° pitch tilt and ±9.5° rotary swing, fulfilling strict alignment demands of optical lens parts and precision fixture calibration. 【High Resolution Micrometer Control】10μm fine graduation enables 1.85° per turn(0.037° resolution for tilt) & 1.7° per turn(0.034° resolution for rotation), stable tiny adjustment for high-precision optical lab setup. 【Standardized Pre-Drilled Mounting Layout】21 spaced M4 screw holes plus 3 φ6.7 through holes on the platform, quick accessory mounting and solid fixing on common optical breadboard and positioning base. 【Compact Size with Secure Lock Function】φ70×37.5mm overall dimension, 37.5mm table height and max 1kg load rating; hand-tight knob realizes axis limit & temporary locking for easy on-site operation. 【Multi-Scenario Universal Positioning Fixture】Perfect for planar calibration and rotary alignment of optical elements, widely adopted in laboratory testing, photonics experiment and industrial precision measurement.