The HHA OTR TE-5510 LH represents the 4th generation of our world renowned Optimizer Series single pin sights. With a redesigned two stage, micro adjust windage unit, all new water resistant sight tapes and a silky smooth 2.1” of travel! The quiver friendly, wheel forward design fused to a sleek, rugged sight frame makes the Tetra ideal for bowhunters and 3D shooters worldwide. Full 2nd and 3rd axis adjustment and compatible with a full line of accessories, the Tetra will quickly establish itself as one of the most versatile sights on the market. An all new micro adjust windage system debuts on the Optimizer Tetra, making for faster set up than ever. Simply loosen the user friendly wing knob and incrementally slide the sight housing left or right to your approximate desired location. An additional ½” of travel with our micro drive then allows you to fine tune your setup one click at a time.