This exciting accessory uses a combination of modern vibration reduction technology and common sense thinking to produce the most durable and effective shock and sound reduction possible. The "S5" string shock and sound suppression system attaches easily and quickly to mounting holes in the riser of 2004 to 2014 EXO-Traditional models. Will work either in conjunction with Excalibur&';s dissipator bar system or on its own to quiet shot noise and reduce vibration. PRODUCT# 1966 NOTE: The S5&';s work with EXO-Traditional Series crossbows only (some stipulations apply) built from 2004-2014