Add to Cart Magic Arm Friction Knob Complete Mounting System Their Price: Our Price: Sale: $250.00 Was: The Magic Arm Friction Knob Mounting System is a durable solution to mounting devices and switches. The Magic Arm can extend 20.5 inches and hold up to 8 pounds. Securely clamp to a wide variety of... Their Price: Our Price: Sale: $250.00 Was: Add to Cart Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: Their Price: Our Price: Sale: $250.00 Was: Subtotal: Add to Cart