The Kinetic Research Group Grip Panel Finger Rest can be added to the standard KRG Grip Panel (inserts version) to help you find the optimal and repeatable trigger finger position. A 1/8" and 7/32" drill bit are required for installation. FeaturesFits: Right KRG Grip Panel (with inserts)Not compatible with old style non-insert grip panelsWeight: 0.6oz (right panel only)Material: Reinforced Polymer