Kong Design Continues To Inspire With Simplicity And Function. The Duck Is A Rope Clamp Ascender That Completely Surrounds The Rope Or Webbing For Safety. The Outside Radius Of The Carabiner Hole Provides A Predictable Surface For Consistent Performance On Rope As Well As Webbing For Climbing And Work Positioning.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }