. Low Friction Rings are a high-load, compact and lightweight alternative to pulley blocks that still deliver excellent performance for specialist applications. Ideally suited to deflecting lead lines and static load applications, they feature a precisely engineered profile that is precision NC machined in aluminum and hard anodized to minimize friction and wear. Attachment via a strop that encircles the load-bearing aperture ensures they are able to deliver extreme high load capacity with added fail-safe security.