Experience high load capabilities with Allen's 20mm Double And Becket Extreme High Load Dynamic Block in sleek black. Top-level sailors have pushed the limits of their existing hardware, leading to a demand for a block that can withstand punishment without sacrificing dynamic performance. Our double-sheaved XHL block is over-engineered to handle working loads up to 600kg, while still maintaining low load dynamic performance. The XHL Bearings feature twin rows of stainless steel ball bearings, along with a protective plain bearing washer, ensuring long-lasting high performance on any boat. The precision plain bearing washer allows the block to convert to a plain bearing when exposed to extreme static loads, preventing damage to the internal bearing system. The aluminium body is designed with "ears" to keep the block from capsizing under load and the stainless steel sheave can be used with both rope and wire. With a nicely radiused becket, this block is perfect for use in vang cascades or halyard turning points,