Allows for accurate, tangle free throws. Use to advance a heavier rescue line (tag, snag, or zip line) across streams, small rivers or other flooded thoroughfares. Quickly connects to larger messenger or line. If distance is less than 150′, this hand-throwing product augments and is often a safer alternative than a powered line throwing device. Specifications: Buoyant throw ball and leader core spliced to 1/8″ (3 mm) polyester cord, in self-containing bag. Snap hook at bag-end for rapid attachment to a larger line. One practice training ball include per order.