Take your range experience to the next level with completely random clay presentations. The Champion Wobble Base Trap Attachment can throw up/down, left/right or both at the same time so that every throw simulates hunting conditions. An on/off switch turns the wobble base into a standard trap when needed. This base works with the Champion Workhorse, Champion WheelyBird and Champion WheelyBird 2.0. Don't go clay shooting - go clay hunting.Specifications and Features: Bird/workhorse Wobble base