This latest tool from CB Model Products is one of the best yet. This high precision punch and die set consists of 12 hardened steel punches and a clear acrylic/metal guide plate assembly. There is a desiccant included to help keep the rust off the metal parts. These pieces are contained in a compact plastic case with a nice hint and procedure sheet.
The steel punches are machined with a slight angle. These punches are designed to be used on up .030 styrene. The punches come in .040”, .051”, .058”, .069”, .080”, .088”, .101”, .110”, .119”, .127”, .140” and .151”. That should take care of most needs in 1/72, 1/48, 1/32, and 1/35th scales. You may want to wipe the parts down with some WD-40 and a rag to preserve these delicate parts for the long term.