6 Piece Telescopic Bore Gauge Set - Diameter Measurement - Spring Loaded PlungerOverview: 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. Supplied in wallet with marked ranges.Features: 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"). Supplied in wallet with marked ranges. Specification: Net Weight - 0.27kg Range - 8-150mm(5/16"-6") Further Information: We sell a wide variety of tools & workshop equipment for both the DIY and Professional markets. With well over 10,000 lines of equipment suiting all jobs big or small, our online store has it all. If you can’t quite find what you are looking for, please feel free to contact us and we’ll be more than happy to help.Alias: ys00631