Gold Tip Ballistic Collar Pierce 400 12 pk.. Also adds additional weight to give the arrow a higher front of center. Fits standard thread 5/16 diameter points. Specifications for Gold Tip Ballistic Collar -.166: Manufacturer: Gold Tip Color: Brass Quantity: 12 Fabric/Material: Brass Weight: 24 g Features of Gold Tip Ballistic Collar -.166 Weight: 24 gr. Spine specific fit Package Contents: Gold Tip Ballistic Collar -.166 Used in conjunction with the Pierce insert to increase durability at the point/broadhead connection. Also adds additional weight to give the arrow a higher front of center. Fits standard thread 5/16 diameter points.