The A2020 Dynamic Block is a preferred choice for small diameter line applications, providing low friction, fast rolling, and strong performance. With a built-in spring and lacing eye, this block stands up easily under pressure. Featuring a patented bearing system, this block utilizes twin rows of stainless-steel ball bearings on a stainless-steel rail for superior load-carrying ability and longevity. The patented Ultra-Strap, created through a coining process, provides added strength, reliability, and rope friendliness. Additionally, the 20 and 30mm blocks include a central rivet for reduced weight and convenient tie-off in a cascade system.