The Roper Whitney Model 5 JR hand punch is a very useful tool for anyone who builds electronic prototypes or works with thin plastic or metal. I have found that it also works well on fiberglass circuit boards.
The standard punch set comes with seven different punches sized from 3/32 to 9/32 in 1/32 inch increments.
There are a total of 16 punches optionally available sized from 1/16 to 9/32 in 1/64 inch increments – this includes the standard series of 3/32 to 9/32. All produce round holes only.
The punch has a one ton capacity. The variables that govern this capacity involve hole size, type of material, and material thickness. For an example, I can easily punch 3/16 inch holes in 1/8 inch plastic, a 3/16 inch hole in 1/8 inch aluminum is a bit more difficult, and most likely would be impossible in 1/8 inch stainless steel.
One excellent feature of all these punches is the center point machined into the exact center of the punch. This allows you to accurately locate the punch in a center punch mark on the material.
Website: Roper Whitney