Hamskea PRS X-Change Torque Tune KitThe PRS X Change Torque Tune Kit is a spacer system that allows you to torque tune your R7 Arrow Rest. This Precision Rest Series (PRS) system utilizes 0. 3; 0. 4; and 0. 5 spacers that can be exchanged and stacked in combination to move the R7 arrow rest further from the bow riser to optimize forgiveness in the bow system. *Compatible with the R7 arrow rest only. [Patent Pending]