Starrett Automatic Center Punches

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These punches automatically strike a blow when downward pressure is applied. The force of the blow is regulated by the adjustable knurled cap. The point can be easily removed for r eplacement. All sizes are identical in style and differ only in the striking power. For gunsmithing. Made in the USA. Item # Diameter Length ST18AA 7/16 3 - 53/84" ST18A 9/16 4 - 13/18" Show more