TenPoint ACU-X Snap-On Nock Features The TenPoint ACU-X Snap-On Nock uses an innovative Snap-On design that produces a clear audible click the moment it properly engages with the crossbow s bowstring. This feedback gives shooters immediate confirmation that the bolt is correctly seated before taking a shot reducing the chance of a misfire or inconsistent launch. Because the nock locks onto the string rather than simply resting against it lateral nock travel during the shot cycle is virtually eliminated. That reduction in movement translates directly into improved long-range precision and accuracy. This nock design also helps preserve the string s center serving since the Snap-On engagement reduces the friction and wear that typically comes from a nock sliding against the string during release. TenPoint specifically requires this nock style for use with its rail-less crossbow models making it an essential replacement part rather than merely an optional upgrade. Finished in green for easy visual identification among a quiver of bolts this package includes 12 nocks enough to outfit a full set of bolts or keep spares on hand. Crossbow hunters running a TenPoint rail-less platform will find this nock a necessary and reliable component of their setup. Tenpoint ACU-X Snap-On Nock Specifications Manufacturer: Tenpoint Model: ACU-X Snap-On Nock Color: Green Country of Origin: USA Compatible Hosts: TenPoint Rail-Less Crossbows Available At: GrabAGun