Gold Tip Kinetic Pierce Arrows - 6 Pack - If you're looking for an arrow that surgically penetrates with blistering speed and will stand up to real-world abuse, you have found it. The Gold Tip Kinetic Pierce is a micro diameter arrow that's built to hunt. Its greatly reduced diameter makes it resist wind drift for long range accuracy. Its decreased weight makes it fly fast and flat. And when the Pierce impacts its target, it has the energy to punch through. Thanks to the patent pending Ballistic Collar Insert System, this surgical arrow has the strength of a jackhammer to take on any hide, meat, or bone you put in front of it. 6 Pack Spine 300 specs 9.1 weight grain Length: 32 in Outside Diameter-.240 in Recommended point weight-85-125 grain Weight at 29 inches- 263.9 grain Spine 340 specs 8.3 weight grain Length: 32 in Outside Diameter-.234 inc Recommended point weight-85-125 grain Weight at 29 inches - 240.7 grain