Screw Checker, Large Metric, PEC

- 8 mm to 14 mm thread sizes
- Quickly identify ISO metric threads
- Coarse, medium, and fine threads
- Made in USA
Screw checkers provide a quick way to measure standard threads. They provide all the information you need for screws; diameter, length, threads per inch, hole size and even tap drill sizes.

These things are quicker and more accurate than using a pitch gage and caliper to measure threads. Simply try the threaded part in the holes until you find the proper one. No guessing or interpretation.
