Grommet be used purely decoratively for crafting. When used in sailing and various other applications, they are called cringles. Sometimes field workers refer to them as grunyons. If metal or another hard material has a hole made in it, the hole will probably have sharp edges. Electrical wires, cord, rope, lacings, or other soft vulnerable material passing through the hole can become abraded or cut, or electrical insulation may break due to repeated flexing at the exit point. Rubber, plastic or plastic coated metal grommets are used to avoid this. The grommet could also protect the wiring/cabling from contamination from dirt,
Patín a vela stays. there is a halyard to hoist the sail along the mast, and another rope whose actuation shapes an area of the foot of the sail known as "dovetail ", when pulled or released lightly, makes an appreciable variation to the flatness of the sail surface.. Currently, the fleets of "Patín a vela" are distributed not only over Catalonia, Andalusia and Valencia, but also reach the French, Belgian and Dutch coasts. Patín a vela Patín a vela, also known as Patín catalán or Catalan catamaran , is a class of boat "one-design" of dinghy sailing with a single crew member.