The Axcel Rheotech Bow Sight with Picatinny Mount is a rock solid, tough as a tank, fixed pin sight that allows you to adjust fiber brightness and eliminate starbusting. The Rheotech provides true 1st, 2nd, and 3rd axis adjustment, making it extremely accurate at any distance. The lock knobs feature gear teeth so the thumbscrews are out of your way and won't catch on weeds or vines as you're trekking to your treestand or stalking your target. The main reason for choosing a picatinny In-Line sight mount is so that you can mount your sight to the front of your bow for better bow balance and to free up the side of your bow for a quiver mount. In addition, the proven picatinny mounting system that has been proven over decades of use in other industries to create a super strong and durable connection to the bow riser.Features Rock solid bow sightAdjustable fiber brightnessExtremely accurate at any rangeSolid, visible level inside scope Micro-adjust wind and elevation knobs Picatinny mount