Gold Tip Pro Hunter Arrow Shafts are for the discriminating bow hunter that settles for nothing less than the BEST! All Gold Tip Pro Hunter shafts are guaranteed to +/- .001 straightness tolerance, and +/- .5 grains per dozen bundle. All Gold Tip Pro Hunter points and inserts accept weight screws to allow you to customize your point weight and forward center of balance (FOC), using the weight adjustment wrench through the rear of the shaft.