6-Piece Telescopic Bore Gauge Set, measures bore diameter with a spring-loaded plunger that expands and locks in place for accurate measurement using a micrometer. Features a satin chrome finish and covers a range of 8-150mm (5/16"-6") with marked increments.

• For measuring bore diameter

• Spring-loaded plunger expands within the bore which is then locked;

• The plunger can then be removed and measured with a micrometer;

• Satin chrome finish;

• Range: 8-150mm (5/16"-6") with marked ranges