MRT (Multi-Ring) Technology Pin Guard 3 and 5 pin versions come with two multi-ring options, a large and small ring as well as a single ring. This increased versatility ensures proper peep sight alignment with most setups. The multi-ring options provide the Archer with a much higher level of accuracy in various lighting situations by always giving the Archer a bright visible ring to align your peep. Even more upgrades include a larger, more visible, better protected fiber optic level, and an improved illumination cavity that allows the sight light (not included) to be more evenly distributed and protects unwanted light from escaping. Bullet Proof pins completely hide and protect the fiber. If you like the adjustability of the Hogg-It but prefer to have your hunting sight hard mounted to your bow then this is the sight for you. The dovetail mounting system has been replaced with a fixed hard plate mount. Micro adjustable 2 2nd and 3rd axis. No Clamp Gang Micro Adjustment. Precision installed Bubble. Individually micro adjustable pins. Round pin guard with alignment ring. Vertical aiming wire for faster alignment. Solid 6061 aluminum construction. Unit of Measure: EA