Features a patented design which gives them strength, durability, and style. Unlike one piece climbers, the CTB Climbers utilize an aluminum lower "J" portion that is precision milled to exact tolerances, then tailor-matched to an aerospace quality aluminum upright. These Climbers also feature a dual purpose "Grip Strip" on the bottom of the climber. The (patent pending) grip strip provides added traction while walking on tree limbs, and doubles as a wear strip to inform you when it is time to replace your "J" Hooks. Ship wt 6 lb