For use when quick identification of screw threads is needed.
Blades are of a narrow design to permit their use in determining pitch for inside and outside screw threads.
Sturdy steel protective case with a locking device at each end to secure the entire set.
Each blade is clearly marked with the proper thread size.
Thread Angle: 60º
Degree: 60º
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WARNING: This Product Can Expose You To Materials And/Or Chemicals Which Are Known To The State Of California To Cause Cancer And/Or Reproductive Harm.