The Allen 20mm Single Tie-On High Load Block is equipped with a stainless-steel head loop, providing maximum strength and reliability while minimizing cheek separation. This unique design also ensures the block stays properly oriented during use. When attaching the Tii-On block, be sure to feed the rope around the central axle and through the head for optimal strength. Available with or without a soft shackle, the high load version includes a stainless-steel sheave for faster rolling speeds and higher working loads. The becket features a large central rivet that reduces weight and offers a rope-friendly attachment, making it perfect for use in a cascade system. The patented bearing system on this block utilizes twin rows of stainless-steel ball bearings on a stainless-steel rail, providing superior load-carrying ability and longevity compared to other systems that rely on plastic rails. This makes it ideal for use in dinghies, windsurfing, kitesurfing, and other applications requiring smaller diameter lines.