Consists of two precision ground pieces which slide smoothly on each other. Locked into position by set screws. Can be quickly inserted into openings and expanded to exact size, then measured with a micrometer.
The set consists of:
- 985-132 - Adjustable Parallel 3/8 - 1/2"
- 985-133 - Adjustable Parallel 1/2 - 11/16"
- 985-134 - Adjustable Parallel 11/16 - 15/16"
- 985-135 - Adjustable Parallel 15/16 - 1-5/16"
- 985-136 - Adjustable Parallel 1-5/16 - 1-3/4"
- 985-137 - Adjustable Parallel 1-3/4 - 2-1/4"