Optimizer Lite features new infinite Adjust Slotted Slide Bracket which enables the shooter to make 2nd axis and vertical adjustments with ease. No more jumping your housing from hole to hole, this new technology allows you to fine tune at 20 yards to maximize your sight tape range.Compatible with HHA lens kits and HHA Blue Burst 2500 light;Scope Housing: 1-3/4";Mico windage adjustments left to right;Elevation adjustments can be made and locked down on the sight tape from 20 to 80 yards in single yard increments;Pin size: .019