Description Features X-frame direct mount 3rd axis base New cnc machined Pro Sight pins are the latest in pin development from Black Gold© smaller pin throat allows for a better sight picture Vertical and horizontal gang micro click adjustments Level Head sight ring is far easier to adjust, far more secure; can be customized to fit into top of sight ring Indicator needle is indexable for easy re-sighting should your set up change Splined vertical drive gear increases durability by 80% and provides a quieter, more solid feel PhotoChromatic shell - 80% tougher, changes color faster 54 sight tapes included - choose the one that's right for you Angled (45°) sight tape can be seen from side or back 1st, 2nd, & 3rd axis adjustability 2X or 4X lens adaptable (optional) Housing size 1 3/4" Pin diameter: .019"