THE PATENTED TOXONICS LOCKING SYSTEM IN THIS SIGHT UNIQUELY LOCKS THE LEAD SCREW AND SIGHT BLOCK WITH THE SIMPLE TWIST OF A KNOB. WITH TWICE THE LOCKING POWER OF THE REST , IT IS THE SIGHT OF CHOICE FOR THOSE WHO SHOOT A LOT OF ARROWS. BOTH WINDAGE AND YARDAGE ARE A 32 PITCH 10 CLICK ADJUSTMENT FOR COMPUTER GENERATED SIGHT TAPES. FOR A QUICK ADJUSTMENT, LOOSEN THE KNOB 3 TURNS AND PUSH IN ON THE KNOB. THIS ALLOWS YOU TO MOVE THE ENTIRE SIGHT BLOCK UP AND DOWN QUICKLY.