this sight is awesome,we have sold 4-5 of them so far. you set the top pin at 20 yards horizontal,and vertical. then set 30 yard pin for vertical. your 40,50,and 60 drop right into place. and they all have been dead on accurate. it also has the built in pin illumination lite,and the sight is all fingure adjustable. no allen wrenches. excellent sight imo.