Bulls Eye, Eyestraps, Fairlead, deck bushe, deflectors are generally used as guides. They can be used to guide, constrain and re-route a control line or ropes. Whether used on a clamp, a swivel or through a hull, these parts mainly avoid :

• avoid machining hulls and ends
• constrain ends and lock them in precise positions
• guide and orient your control lines in precise axes.
• allow blocks, swivel and other objects to be fixed in a desired position

These are very important parts for preserving the overall condition of your fittings, your ropes and your boat!
Choose parts with metal reinforcement (stainless steel, anodized aluminum) or PFTE for greater longevity.