No more guessing and gapping. Optimizer Speed DIAL (DIAL = Deadly Accurate, Infinite Adjustments, Amazingly Simple, Lightweight) is accurate to the yard from 20 to 80 yards and includes calibrated tapes for bow speeds of 260 to 410 FPS.

Specifications and Features:
Rock-Solid CNC Machined from Aluminum
Easy 2-Bolt Installation
Lightweight and Durable
Accurate to the yard from 20 to 80 yards
Calibrated tapes for bow speeds of 260 to 410 FPS
Fits most current crossbows
2" Groups from 60 yards
4" Groups from 80 yards
Weight 7oz