These climbers have a patent pending design that gives them strength, durability and style. Instead of making the aluminum stirrups out of one piece, Climb Right has separated it. The lower portion is made out of an aluminum designed for the aerospace industry and both portions are T6 tempered for strength. There's a patent pending grip on the bottom of the climber that gives you more traction when walking on tree limbs. Combine that with their Ultra Light Pads you've got the state of the art climbing set. The Ultra Light Pads are also made from that sturdy light weight aluminum yet they are built to fit and last. The guys at Climb Right designed these at an ergonomic 16.5 degree offset angle. The gaff sleeves are an integral part of the sturdy aluminum shell and combine that with foam pads that are replaceable and washable you've got one heck of a deal. Keeping this all cinched on securely are heavy duty Velcro straps. Light weight at only 10.3 ounces per pad without the gaff. Tree gaffs are 2-5/8" in length.Gaff Guards (90150) included.