F NOCK is not a tipical pin nock.
In this years we found that bowstrings materilas and specially the servings has evolved to different thickness than when groove diameter sizes was created. We find in our test that if we want the best performance bowstrings we need to lighten the center. Now exist smaller diamenter servings, more durable and solid.
Actual nock sizes are standards till more than 20 years and don´t change in this time. .98 and .88 are standards, and in most cases don´t fit good enougth , some time loose and some times tight. Most of archers solve this question using larger servings on the bowstring center serving. Nothing is more harmful to the performance of your bowstring that add weight to the center of the string, but no other soltuion on the market.
Now , yes you can. Archers have now other two options to fit correctly with not loose on the bow performance. Oh .. on the bow performance? Yes, the bowstring in one of the bow arts : riser, limbs and string. If you look for the speedest limbs, the more precise riser and you want that both work well, you need the best string, with the minimun weight on the center and the correct nock.
F NOCKS are designed for use on most of the pins avalaible today and have two different grooves size : F1 a lit smaller than .88 and F2, a lit smaller than .98.
F NOCKS shape is aerodinamically designed and offer the minimum surface to deflect arrows on tight gruops.
F NOCKS are manufactured 100% in Europe with a high quality policarbonate.