Spot Hogg Hogg Father Triple Stack MRT Sight 3 Pin .019 LHIntroducing the Triple Stack system. This new setup features three individually micro adjustable vertical pins as well as three individually adjustable yardage indicators. Double pin lovers cheered this design, and now we've added a third aiming point and additional yardage indicator. The Triple Stack allows archers to set gaps for all three pins, and the adjustable pointers provide constant yardage updates as the dial is turned. The Always Up solar