Precision machined brass rack and pinion delivers smooth operation. Wheel forward design is ideal for mounting one-piece quivers. Fully integrated 2nd and 3rd axis adjustment. Interchangeable wheel allow for quick changes between multiple arrow or draw weight combinations. 2.1â?쳌 of vertical travel adjustment. Sight tape magnifier allows for adjustment to the 1/4 yard. â??Blind 20â?쳌 feature allows for fast, no look return to your most common predetermined distance. 5â?? fiber length. Features mechanical rheostat. 1 5/8â?쳌 housing. Uses lens kit B.