Designed To Work With Ropes From 8 12 Mm, The Lift Ascenders Have A Comfy Handle And A Locking Design That Prevents The Ascender From Accidentally Coming Off The Rope. Kong&';s Chest Ascender Is Designed To Fit Tight Against Your Body For Rope Climbing Efficiency.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }