Reduces vibration; Reduces string noise; Lightweight construction; Durable, replaceable suppressor pads; Easy to install; Fits TwinStrike series crossbows; Keep your string system quiet and your hunting more successful with the Excalibur R.E.D.S. Sound and Shock Absorber; Suppressors are essential crossbow accessories when you need less noise and vibration while hunting; They'll boost your hunting game so you can be the quietest predator around; By choosing Excalibur, you choose the experience and technologies of hunters