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ChgImposs Metric & Imperial & US Screw Gauge SAE Whitworth 55 Degree & Metric 60 Degree & & US 60 Degree Thread Pitch Gauge for Industrial Measurement
It is 55 Degree & 60 Degree Thread / Screw Pitch Gauge gage with lock up device. Typically used to check the thread size determination is correct
HHIP 3900-2013 3" Ultra Precision Toolmaker's Vise, 73mm Jaw Width
Hardened and precision ground, HRC5560 degree