Matthews Grip Heads are top-tier in strength, offering a 'set it and forget it' experience. Their plates boast two holes, 3/8" and 5/8" in diameter, for clarity. New castings ensure positive locking in all directions. At 4-1/2" and 5lbs, it's the industry's favorite. The 'Gag' combines two sets of Grip Head Plates on one shaft, serving versatile purposes like creating a yoke or converting arms. The 'Double Gag', or 'Lollypop', combines two Grip Heads onto one 1/4' shaft, allowing individual locking.