X-TRA Yardage Wheel Gen I fits all Spot Hogg Hogg Father and all Tommy Hogg sight models.The Gen I wheel allows the archer to develop pre-printed yardage tapes that can be used to accurately shoot different arrow set-ups (weights, spines, fletchings, broadheads, field points, etc.) without the need for major changes to their sight.
Simply "lock" the sight on 20 yards, remove the existing yardage wheel and replace it with any number of X-TRA Yardage Wheels with the appropriate sight tape.Once reinstalled, simply align the sight's pointer to the 20 yard mark on the tape and "unlock" the sight.Just that fast, the archer is ready to shoot a different arrow set-up without time consuming changes to the sight.
When it's time to go back to the original arrow set-up, simply reverse the procedure and your ready to go!
Now you see why we say, "We reinvented the wheel so you don't have to!"