F.O.C. or Front of Center is crucial to the penetration and overall effectiveness of your arrow. The F.O.C.O.S. by Black Eagle is designed to give you a boost in F.O.C. by adding weight to the front end of your arrow. Made of three parts, the outsert is made of 7075 T6 aluminum and weighs 45 grains, the retention post is made of stainless steel and weighs 30 grains. The final part is a 3/32 allen head retention screw that allows for outserts to be screwed or screwed and glued in place. This all adds up to a total of 80 grains, adding to your overall F.O.C. without having to change your broadheads! Specifications: Outsert Construction: 7075 T6 Aluminum Outsert Weight: 45 gr Retention Post Construction: Stainless Steel Retention Post Weight: 30 gr Total Weight with Screw: 80 gr Designed to Fit Black Eagle Instinct