Low Friction Rings Large 1-1/2″Low Friction Rings are made of Premium Aluminum and Aircraft Quality Coating for a Super Smooth Glide when running rigging line through the middle. Excellent add-on to all Dead Eye Slings, Whoopie Slings and Ring to Ring Slings.Applicaiton:Rigging Line is wrapped around the outside and run through the middle.Lowering Lines (Bull Rope)Whoopie Slings12-Strand and Double Braid Composite SlingsRing to Ring SlingBenefits:Easier and Faster than a block rigging system”Ammo Blue Aircraft Quality Coating” helps retain Quality and GlideLight and Easy to HandleSimply Quick RiggingNotice: When evaluating rigging systems it is necessary to recognize the capacity of each individual component. As with pulleys, when running lowering ropes through Rigging Thimbles the smaller the bend radius the greater the lose of load capacity. Slings with multiple Rigging Thimble will create a larger bend radius for you lowering ropes. In systems where you use a single Rigging Thimble it is important to recognize the reduced capacity in your rigging system.