The KBO rope lashing, which comes supplied with the block, makes fitting easier and quicker than standard shackles and will never sieze due to load or rust over the years. The cheeks are made from aluminium alloy and the block features a two stage bearare made from Plastic & fibre and the block features a two stage bearing system to enhance their low friction performance under higher loads. The range includes Double and Triple versions up to KBO8 which make them ideal for building cascade systems.