Dynepic Sports Spiral Strength Dually - Tricep Rope Dynamic coupled system featuring two spiral strength grips. Patented. Allows for a neutral grip and unrestricted natural movements. Universal grip design can be used in two orientations. Designed for a broad range of male and female hand sizes Dynamic Coupling Adds a Bilateral Stability Control Training Element Durable US Made Rubber Grips, Aircraft Grade Aluminum Pulley, Stainless Steel Quicklink Premium Double Braided Minimal Stretch Polyester Rope, Product Rated for 300 lbs.