Faster and easier to use than the traditional sliding prusik knot on a treestand safety line, the TROPHYLINE Ropeman 1 Safety Line Ascender helps treestand hunters get to the treestand and back safely. Designed to slide up and down the ropes easily while you climb and descend, this sturdy tool grabs the rope and stops your descent in the event of a fall. Made with hot forged side plates, an alloy cam, and high-strength stainless steel axle, this rugged ascender fits on safety ropes ranging from 1013mm in diameter. Stainless steal cable leash. Tested to EN 567 Standards. Easy to use safety ascender/descender tool for treestand safety line Faster and easier to use than sliding prusik knot Strong and sturdy - hot forged side plates, alloy cam, and high-strength ss axle Fits on safety ropes ranging from 1013mm in diameter Stainless steal cable leash Tested to EN 567 Standards