The jackknife-style of Rocky Mountains Warhead Broadheads flies like your field points but opens on impact to a 1-3/4, leaving massive bloods trails to follow. Aircraft-grade aluminum ferrule protects the razor-sharp blades until the head is inside the animal, where they can inflict maximum damage. 0.35 blade thickness. Cut-on-contact tip maximizes penetration for shorter, more visible blood trails. Made in USA. Per 3. Cutting dia: 1-3/4. Wt: 100 gr. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Mechanical Broadheads.