Gold Tip Pierce Insert 12 pk.. Accepts standard thread points/broadheads. Also compatible with FACT weight adjustment system (.166 size only). Specifications for Gold Tip Pierce Insert: Manufacturer: Gold Tip Inner Diameter: 0.166 in Color: Aluminum Quantity: 12 Fabric/Material: Aluminum Additional Features: 19.5gr Features of Gold Tip Pierce Insert: Weight: 19.5 gr Fits .166 shafts Use with appropriate size Ballistic Collar Package Contents: Gold Tip Pierce Insert Used in conjunction with the Pierce Ballistic Collar. Accepts standard thread points/broadheads. Also compatible with FACT weight adjustment system (.166 size only).