7/16" GripFlex-24 Climbing Rope; Climbing rope is made with a 24-strand braided polyester cover with a braided polyester core. These ropes are static climbing lines for use by tree care professionals. They have superb knot holding ability and can be spliced. Lines are comparably light weight and maintain their roundness while in use. GripFlex-24 is low stretch and high abrasion.