The “twist-on” board attachment system allows you to hand attach, hand adjust, hand remove. It is low profile, low bend point, on center, free rotating above and below the Streamlined joint [joint has a 3 line Dyneema safety, gets you back without damaging your board]. This tried and true design is bullet-proof and will not let you down. All these things together, this design with the twist-on system, the original best tendon joint, and the Euro pin, has been used by competitors and serious windsurfers worldwide. It is known to be the best. It’s pro-tested!