A step bit or hole saw is often useful when makeing holes to routing wires for various RV power projects. These step bits will make a clean hole in thin metal, plastic or wood. A step bit or hole saw is required to drill the output hole in the base of the Zamp C-Box and is also recommended when using the additional "knockouts" on the sides of that box.

These step bits are in a 2 pack (3/16"-7/8" & 1/4"-1-3/8").