Trophy Ridge ADA210R HXl Vertical Drop TechnologyTHE HXL TAKES VERTICAL DROP TECHNOLOGYâ TO THE NEXT LEVEL. The limb driven design eliminates timing issues and allows for a longer dwell time on the rest, making the HXL ultrareliable and deadly accurate. 100% arrow containment ensures your arrow will be ready, whenever your opportunity is presented.FeaturesExclusive vertical drop technologyRugged machined aluminum constructionLimb driven design will work off of either the bottom limb of the bow or the upward moving bow cable100% arrow containmentRemovable containment arm for larger diameter arrowsLinear bearings provide smooth, silent operation