The Motiv TR2 carves through deep oil and punishes the pins. MOTIVat-R Coverstock. Wet-sanded to 800 grit finish for traction in heavy oil. Thrust Inner Core. Provides a strong arcing reaction and stores energy for a punishing finish. 16# RG 2.53 Diff 0.048 15# RG 2.54 Diff 0.052 14# RG 2.57 Diff 0.048