Technical Data:
Series: 155
Product type: Telescoping Gage
Application: Comparing and measuring small-hole diameters and narrow-groove widths
Measuring principle: Spring-loaded plunger expands within a bore or groove and is locked in place; dimension is then measured with an outside micrometer after extraction
Set range: 0.313 - 2.125 in

Content:
155-121 - 0.313 - 0.5 in
155-122 - 0.5 - 0.75 in
155-123 - 0.75 - 1.25 in
155-124 - 1.25 - 2.125 in