Most advanced peep out there. Two in one peep design. 1) Improves accuracy with micro feedback with 3/16 center and side guides to help you align with your sight housing. No more inconsistent groups, more accurate anchoring with your eye than point of contact with nose or mouth device 2) a better field of view with almost 50% more viewing area to keep you anchored in the moment of truth. No more tunnel vision and lack of ability to quickly find an animal through your peep. 3) hunt until last light with no peep blur to block your vision from your sight housing and pins at last light. Works in a tree stand, on the ground, or in a ground blind. Enjoy how a peep should really work! Made out of aluminum.