Metalcraft Hole Punch Gauge SMC1526
The Metalcraft Hole Punch Gauge is designed to make it easier for finding and punching holes in the center of flat metal steel strip. This hole punch guide could just be what you are looking for.
Just simply loosen and drop the platform on your punch and shear tool, bring the handle down so the punch pin is fully inserted to the punch block, then offer the gauge underneath the pin at the desired hole. Lift the platform to fully support the gauge and lock the platform in place. Next retract the pin and remove the gauge, the tool is now set.
The gauge works with flat metal steel strip widths of 3/8", 1/2", 5/8", and 3/4" for 1/8" holes AND for 3/16" holes it works with widths of 3/4", 1", and 1 1/4".
Hint: As there is a slight taper to the punch pins, it is recommended that you try to locate the gauge neared the end of the punch pin at its widest point.
Gauge is made of Stainless Steel. 3 5/16"L x 13/16"h.