Front of Center (FOC) balance point is a very important factor in determining the accuracy of your arrows. Adding weight to the point end of the shaft will increase overall arrow weight and alter dynamic spine. Importantly, these adjustments can be made in the field or on the range without removing the insert. Simply pull the nock or pin bushing out of your arrow and use the Gold Tip weight wrench (Item #7228) to make adjustments. Available in 3 weights: 10 Grains, 20 Grains & 50 Grains, sold per dozen.