Ultra - Rest Quad Hunter: Exclusive Velocity Drop - Away technology at a GREAT PRICE! The best value in drop-away rest technology and built for serious performance. Unlike other drop-aways that use inertia or vibration, the Ultra-Rest uses the velocity of the forward movement transmitted by the timing cord attached to the downward buss cable. This Velocity Drop-Away Technology (VDT) is an Ultra-Rest exclusive. Stays cocked even on slow letdowns and will only drop away if the bow is fired; Totally captures the arrow for easy use while stalking; Super quiet operation thanks to rubber bumpers and laser-cut felt; Adjusts to shoot shorter arrows... works with arrows up to 4" shorter than competing designs; Get the shot off without shooting a hole in your budget.