This document summarizes a Russian technical standard GOST 25161-82 that specifies broaches for cutting slots with involute profiles in diameters between 70 and 90 mm and centering at the outer diameter. The broaches have modules between 3.5 and 5 mm and are driven from both sides. It provides the construction and dimensions. Contact Russiangost.com for a copy of this standard in various languages including a downloadable electronic PDF or MS Word version.