This is my style of guillotine tool for use with an anvil hardy hole. Included are three die sets - fuller, flat & butcher. The guides are precision machined from solid stock. The tool made to fit in an anvil hardy hole - hardy shank sizes from 3/4" to 1&1/4" (~19mm to 32mm). Please specify hardy shank size, in either fractional inches or millimeters, when ordering. The dies are made from 1050 medium carbon steel and are properly heat treated. The throat opening is approximately 1&1/2". This type of guillotine tool is relatively small but can be an invaluable tool for blacksmithing. I use my own on a daily basis.