Three blade head to thread one piece cut on impact broad head that features a cut on impact nose, multi-tapered blades with easy to sharpen edges. The Montec has a cutting diameter of 1 /16" and a weight of 100grains. RELATED INFO: Vendor - 4204 Cutting diameter 1 1/16". Straightness + or - .003". Montec sharpening stone item # 19568.Revised 9/29/09 Catalog states these are 1 1/8" they are actually 1 1/16"