Features:

-Ratchet and lock nut.

-Extension collars: 25mm/1″, 50mm/2″(within 1000mm/47″)

                              50mm/2″, 100mm/4″ (over 1000mm/47″)

-Carbide Measuring Face.

-Pipe combined frame for light weight and high rigid.

-Size: Metric or Inch.

-Graduation: 0.01mm (metric) / 0.0001″ (inch).