The Magic Finger pn388210 has become one of the most popular grip accessories of all time. The 5/8" pin attached to the ball joint pivots from -15deg. to +90deg. while the collar rotates 360deg. All axis lock positively with one locking handle. The stand mounting portion has an outside diameter of 5/8" to fit into a Junior Receiver, while the inside is bored to mount on a 5/8" pin. The Matthews Magic Finger is machined from one solid piece of steel which allows for the strongest, safest product of this type available. Knockoffs of the Matthews Magic Finger are made from two pieces of steel that are bolted together and do not offer the unitized characteristics of the Matthews product.