The Allen 30mm Dynamic Triple Block with Inverted Cleat is often used in cunningham or vang systems to provide increased purchase. With an A.676 Cam Cleat and pro-lead, this block is perfect for securing ropes and ending purchase systems. Its patented bearing system features twin rows of stainless-steel ball bearings on a stainless-steel rail, ensuring high load-carrying capacity and durability. Additionally, the patented Ultra-Strap, found in 20, 30, and 40mm Dynamic blocks, has been designed with a unique coining process that makes it stronger, more reliable, and more rope-friendly than other designs. This block is a leader in the marine industry.