RAM Arrow Spine Tester - Spine tester allows arrows to be sorted for perfect consistency and increased accuracy. Tester can also be used to find the stiffest side of the arrow for improved consistency from one arrow to the next. Dial reads in increments of .0005". Sort arrows for perfect dynamic spine stiffness Align nocks in relation to shaft spine "backbone" for tightest groups Adjustable distance for testing spine Broadhead tool checks the concentricity of broadheads to .0005" Measure arrow spine degradation of arrows throughout the season Essential tool to obtain the ultimate arrow accura