The Hardcore Extreme Buckle 2.0 is an improved and more compact version of the original Hardcore Release. This new design is approximately 30% smaller for a better fit and feel in your hand. The open hook design allows quick and easy attachment to your D loop without taking your eyes off your game. The True Center Technology uses a self-centering knuckle to eliminate string torque while offering a comfortable contact point with your face. The original hook design has been improved with an ultra-durable Nickle Boron coating to reduce friction and improve accuracy. Customize the fit precisely to your preference with the 360-degree rotatable head with length adjustment that allows almost a full inch of adjustment.