Check the listing for details. TenPoint Universal Crossbow Discharge Arrow w/ Alpha-Nock. Condition: New. Listed at 35.38 USD. The crossbow discharge shaft includes a 20-inch carbon shaft with an Alpha-Nock installed, a discharge collar, and a field tip. The 725-grain shaft with an Alpha-Nock is designed for use in most crossbows that fire a 20-inch shaft. It can also be used on most crossbows that require flat points, moons, or catches. The Alpha-Nock can be used on any TenPoint, Wicked Ridge, or Horton Crossbow Innovations crossbow. Use of the Alpha-Nock on any of these crossbows, even if your crossbow originally required the use of a flat nock or Omni-Nock. 20-inch carbon shaft with Alpha-Nock technology.Alpha-Nock features a deep groove, large smooth radius base, and elongated lugs; resulting in straight travel and lower-range precision, while minimizing string wear.The 725 grain finish shaft is designed for use in most crossbows that fire a 20-inch shaft.It is used on most crossbows that require flat moles, moons, or catches.Includes 1 discharge crossbow arrowWARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.