The Trophy Ridge® Shock Stop bow stabilizer has a built-in knuckle and is harmonically tuned for 22" to 27" inserts. When you're at full-draw waiting for your trophy to stop in that perfect spot, rest assured that our stabilizers will give you the balance you need to remain steady. And after you let your arrow fly, have no doubt that remaining vibration from your bow will be eliminated. Shock Stop stabilizers work...period. Camo finish.