The PRIMUS incorporates additional improvements over the time-tested Rope Guide. The pulley is upgraded to the ART Cocoon. The adjusting device is smoother and ensures excellent grip in every situation and will easily release for re-positioning after a heavy load. All mechanical parts are encased inside the milled aluminum block offering extreme durability. Integrated shock absorber (ZIP ABSORBER) with visual overload indicator which reduces to less than 6 kN in the event of a fall. Easy to adjust - and retrieve. Combine with a Double Snapper. Made in Germany.