●Static tension from 12 mm rope to 3306LB; static extension rate less than 3% ●The sewing force of the sewing buckle is 2 tons, the sewing of the machine is safer and the rope head is equipped with a plastic sleeve, which can effectively reduce friction between the buckle and the rope. ●Material: reinforcement wires made of high strength polyester fiber, stain resistant, easy to clean, wear resistance ●Weight per metre: approx. 70g ●All-purpose: climbing, caving, canyoning, rescue, engineering protection