In the Challenge Course industry to reduce wear and tear on your ropes Shear Reduction Devices are used. These Shear Reduction Blocks can be used in most belay systems and are required on power/pamper pole and high impact elements. They provide 6" to 9" inches of shear reduction area, are made of stainless steel. These shear reduction blocks have a rated 20,000 lbs breaking strength. A black anodized finish is added for rust protection. Shear Reduction Blocks and Mini Shear Reduction blocks are designed and manufactured by Adventure Experiences, Inc. All prices subject to change without notice. Call for pricing.