4-Blade Fixed Broadhead - 100 Grain - Cut-on-Contact Main Blade - 22/64 Aluminum Ferrule - .040 Thick Main Blade - .030 Thick Bleeder Blade - 1 1/8 x 3/4 Cutting Diameter - 3 Pack - The Rocky Mountain First Cut-X features an 22/64 diameter aluminum ferrule for proper bolt alignment and they are 100% spin tested for enhanced precision and greater devastation. The First Cut-X has been tested and is field point accurate at over 420 fps for today's crossbow speeds. The Two solid main blades give this 4-blade fixed broadhead a 1 1/8 x 3/4 cutting diameter.