Features
• For quick inside measurement and determination of inside diameters
• Spring loaded plunger that expands in the bore or groove
• Satin-chromed body
• With auto extension and direct locking
• Measuring faces are hardened and micro-lapped

Range 12.7-150mm
12.7 – 19mm
19 – 32mm
32 – 54mm
54 – 90mm
90 – 150mm