Speed is everything when the top of the podium is on the line. That’s why the Mark 5HD Competition Speed Dial features an enlarged first row of numbers allowing you to make quick elevation adjustments on the fly. Equip your rifle with this match-ready dial and you’ll be outpacing the competition from your first shots fired. – The Mark 5HD Competition Speed Dial provides two revolutions of elevation adjustment and prevents accidental dial movement with our patented push-button ZeroLock. Whether you run jump or slide into your shooting positions your dial won’t turn until you’re ready. – Enlarged Numbers – Aggressive Knurling – Zero Lock Dial – Zero Stop