Excel 30607 7/16" Pounce Wheel Tool
This pounce wheel tool works great to simulate nail holes in old or poorly maintained clapboard siding on O scale structures and some HO scale structures. Choose the right size for your needs. I have found the 7/16" wheel works best for most O scale clapboard and HO scale board and batten milled siding.
This wheel creates 14 perforations per inch which translates to:
Approximately 6" spacing in HO Scale
Approximately 3.5" spacing in O Scale.