Precisely made, these points glue into the shaft just like a NIBB. These points are made of hardened steel with a black finish. With the exception of the 70 grain (2412, 2512 and 2613) being made of aluminum and anodized gold. The 50, 70, 100, 125, 180 and 200 grain points are adjustable in 5 grain increments with a total increase of 60 grains with socket set screws that are sold separately. The ACC size shafts (3-04 to 3-28 has a total increase of 25 grains with set screws; 3-39 to 3-71 total increase of 42 grains.) 70 grains