Precise and sensitive The internal mechanical design provides high sensitivity and accuracy for operation. Range 0-3 mm, indexing value 0.01 mm, delivering high measurement precision. Durable semi closed structure Coaxial centering dial with a semi closed design protects the indicator from damage caused by foreign particles during operation, improving reliability and durability. Clear and easy to read Large dial with clear marks and numbers, plus a transparent cover, allows fast, accurate readings and comfortable use in daily tasks. High efficiency As the machine spindle rotates, the indicator can stay stationary at any desired position. This enables precise, free table positioning, boosting overall efficiency and accuracy. Specifications at a glance Range: 0-3 mm Graduation: 0.01 mm Coaxial centering indicator with semi closed structure Transparent cover for easy reading Typical use scenarios - Align and center workpieces on milling machines or drill presses for precise hole patterns. - Check and verify coaxiality of rotating fixtures or spindles during setup on CNC or manual machines. - Rapid setup and repeatable positioning in jig work or inspection tasks requiring accurate centering. This indicator is designed to enhance precision, protect the instrument, and improve workflow without compromising reliability.