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,
Bolt rope its original twist, as it is sewn in place, to avoid distorting the edge of the sail. He observed that, "Many a well-cut sail is spoiled by the roping." Bolt rope A bolt rope (Variants: "bolt-rope" and "boltrope", French: "ralingue", Spanish: "relinga", Old Norse: *"rár-línk", comprising "rár" genitive of "rá" "rope" and "línk" "edge of a sail "), is the rope that is sewn at the edges of the sail to reinforce them, or to fix the sail into a groove in the boom or in the mast. Fore-and-aft sails often have bolt ropes on the leading edge (luff) where