The structure of this Durable Crossbow Stringing Aid is made specially to deliver the best performance to hunters; Change your strings on the Excalibur TwinStrike Crossbow easily with the help of this DualFire Stringing Aid without the use of a bow press; String changes with Excalibur String Replacement Device on the range or in the field can be accomplished quickly without losing valuable time; This Versatile Crossbow Stringer works with Excalibur TwinStrike crossbow that equipped with DualFire Technology; Excalibur's archery gear is known for its durability, versatility, and changeability; By choosing the Versatile and Durable Excalibur DualFire Crossbow Stringing Aid you choose the experience and technologies of hunters; Be sure, Crossbow Hunting with Excalibur equipment provides the utmost performance and durability; Will not work on non-DualFire Technology crossbows. For those crossbows, see item 2097