Screw Chek'r

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Product Details

The Screw Chek'r identifies all machine screws, bolts, wood screws, self-tapping screws, and standard size rivets up to 5/16" diameter. The Screw Chek'r also identifies correct thread pitch for Coarse and Fine threads up to 5/16" diameter. Correct tap sizes are also shown. A must have for any tool box!

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