Make it easier to change the strings on your TwinStrike Crossbow (not included) with the Excalibur DualFire Crossbow Stringing Aid. Eliminating the need for a bow press, this handy stringing aid allows you to switch out strings on the dual-shot TwinStrike quickly in the field or at the practice range. Designed for crossbows with DualFire Technology. Manufacturer model #: 74391. Stringing aid for DualFire Technology crossbows from Excalibur Eliminates the need for a bow press Works with TwinStrike Crossbow (not included) Lets you switch out strings in the field or at the practice range Designed for crossbows with DualFire Technology