About the product
- Measures diameter, thread pitch & length of nuts, bolts & screws
- Measures fractional bolts from size #4 to 1\" up to 7\" long
- Measures metric bolts & screws from size 3mm to 22mm
- Made of very durable 1/4\" thick hard plastic
- 1/4\" thick x 8-3/4\" Long x 3-3/8 Wide
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