Telescopic gauge 8-150 mm internal gauge set 6 pieces

Specification: Material: hardened tool steel Silver color Interval : 5/16 - 1/2 (8 - 12.7mm) 1/2 - 3/4 (12.7 - 19mm) 3/4 - 1-1/4 (19 - 32mm) 1-1/4 - 2-1/8 (32-54mm) 2-1/8 - 3-1/2 (54 - 90mm) 3-1/2 - 6 (90 - 152mm) Package Included: 6pcs x Precision Telescopic Gage (packed with bag) Use: Under uniform spring tension the gauge piston expands from the center to the diameter of the hole or the width of the slot to be measured then locked in place by a knurled knob. Hole size is determined by measuring the point of contact using a micrometer or gauge. Remark: Please allow 1-5mm errors due to manual measurement Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.