Intelligently designed and crafted to outlast and outperform "standard" equipment, our blocks have all-steel construction that provides for high working loads and longevity. If you prefer Nylon, we offer cast nylon sheaves in lieu of inferior injected molded products. The process of injection molding causes the sheaves to be brittle when complete. The cast nylon process allows for the nylon to cure properly providing a stronger and much more stable finished product. Our rope locks are fabricated completely from steel. We even fabricate the dogs and handles from machined steel in lieu of cast products. Our attention to detail, especially as it relates to intended useful life, makes our rigging simply the best in the industry.