Screw Checker Gage, 1 - 5/16" - 13-342-1

• Ingenious gage quickly tells you size, pitch, tap drill sizes, clearance drill sizes, tap series, length and basic diameter of American, Unified and Metric machine screws.
• Straightens bent screws and cleans up rusty or battered threads.
• Perfect for holding screws for cutting, filing or altering heads.
• Includes complete instructions, drill chart, conversion table and chart, and how to straighten and cut screws using checkers.
• Made of chrome plated steel.

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