When stalking, drawing, or slow let down, the ULTRA-REST is working for you full time totally supporting and capturing the arrow. Unlike part-time drop-aways that only work at full draw, drag arrow across the bow shelf, and allow the arrow to fall off the rest. With the VDT (Velocity Drop-Away Technology) this rest boasts Smart-Rest Technology, the patented VDT knows to only drop away when the bow is fired. The ULTRA-REST is the only arrow rest on the market to offer these features. LDT (LOCK-DOWN TECHNOLOGY) eliminates rest bounceback--guaranteeing total fletching clearance. Increased speed and accuracy offers minimal friction and zero fletching contact. Also shoots the shortest arrows possible. Up to 4" shorter than the competition. LIMITED LIFETIME WARRANTY.