Also known as low friction rings, lowering rings, lead rings, hard eyes and thimbles. High Load Thimbles are a great alternative to blocks when there is a need for high static-load capabilities. Our high load thimbles come coated in Teflon to help reduce friction. CNC machined from aluminium and anodised in a choice of 6 colours: black, blue, silver, purple, gold and orange. Find out how to use a High Load Thimble. Also ideal for Arboriculture Theatre scenery movement Kite surfing Paragliding.