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A hook is a tool consisting of a length of material, typically metal, that contains a portion that is curved/bent back or has a deeply grooved indentation, which serves to grab, latch or in any way attach itself onto another object. The hook's design allows traction forces to be relayed through the curved/indented portion to and from the proximal end of the hook, which is either a straight shaft (known as the hook's shank) or a ring (sometimes called the hook's "eye") for attachment to a thread, rope or chain, providing a reversible attachment between two objects.
In many cases, the distal end of the hook is sharply pointed to enable penetration into the target material, providing a firmer anchorage. Some hooks, particularly fish hooks, also have a barb, a backwards-pointed projection near the pointed end that functions as a secondary "mini-hook" to catch and trap surrounding material, ensuring that the hook point cannot be easily pulled back out once embedded in the target.
Variations
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Bagging hook, a large sickle or reaping hook used for harvesting grain
Bondage hook, used in sexual bondage play
Cabin hook, a hooked bar that engages into an eye screw, used on doors
Cap hook, hat ornament of the 15th and 16th centuries
Cargo hook, different types of hook systems for helicopters
Clothes hook or "coat hook", hooks for storing garments, typically mounted on walls or vertical surfaces
Crochet hook, used for crocheting thread or yarn
Drapery hook, for hanging drapery
Dress hook, fashion accessory
Ear hook, to attach earrings
Fish hook, used to catch fish
Flesh-hook, used in cooking meat
Grappling hook, a hook attached to a rope, designed to be thrown and snagged on a target
Hook and chain coupler, mechanical part for the coupling for railway vehicles
Hook (hand tool), also known as longshoreman's hook and bale hook, a tool used for securing and moving loads
Hook-and-eye closure, a clothing fastener
Hook-and-loop fastener, a type of textile fastener
Hook hand, also called prosthesis, an artificial hand replacement made from a hook
Lifting hook, for grabbing and lifting loads
Mail hook, for grabbing mail bags without stopping a train
Meat hook, for hanging up meat or carcasses of animals in butcheries and meat industry
Prosthetic hook or transradial prosthesis, part of a prosthetic arm for amputees
Purse hook, used to keep a woman's purse from touching the floor
Shaker peg, used to hang up garments, bags, chairs, etc on a vertical surface
Shepherd's hook, a staff used in herding sheep or other animals
Siege hook, an Ancient Roman weapon used to pull stones from a wall during a siege
Tailhook, used by aircraft to snag cables in order to slow down more quickly
Look up hook in Wiktionary, the free dictionary.
Gallery
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A cabin hook used as a latch for a wooden gate
Fish hooks are pointed and often barbed to help catch and tether a fish's mouth
The main anchor of IJN battleship Hiei with the classic double-hook design
Clothes hangers with a top hook to hang onto a crossbar or a clothesline
Hook Tutorials:
\"Hook\" is a broad programming term that usually refers to replacing default behavior with a custom behavior or injecting a listener into a stream of activity.
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