Adds F.O.C. to all 5 mm Easton shafts Built for arrows with .204" ID Uses AMO standard 8-32 threads with a 5/16" diameter field point Weight: 25 grains Quantity: 12-pack Compatibility: #1 fits FMJ 500 spine | Axis 700, 600, & 500 spines #2 fits FMJ 400, 340, 300, & 260 | Axis 400, 340, 300, & 260 spines Note : Not compatible with FMJ Dangerous Game 250 spine arrows