The SDS system reduces string and oscillation noise. Unique cable slot mounted string stop. The dampening rods are micro adjustable for a custom fit and have high impact rubber dampeners that reduce the string's vibration without reducing the speed or accuracy of the arrow. The SDS system is compatible with post 1999 TenPoint thumbhole models, except the GT curve model. Package includes all adaptable mounting hardware to fit the former 6 Point series crossbows, except the recurves, and all Wicked Ridge crossbows.