·        Fast and easy measurement of Outside, Inside, Step and Depth dimensions

·        Measures to .001"(.02mm on #50012)

·        Hardened Measurement Surfaces

·        Covered Srew-On Premium Rack Gears

·        Rugged Indicators

·        Convenient Storage Case

·        Crisp Bar and Dial Rulings

·        "Easy Glide" Action for smooth movement

·        6"-12" and 150mm models have Thumbrollers for smooth jaw movement

·        Jaw locking screws to preserve readings and settings.