Hook Shot

For The Legend of Zelda: A Link to the Past on the Super Nintendo (SNES).

When Link gets it

BOING! This is the Hook Shot! It extends and contracts and… BOING! It can grapple many things!

Where it is

Kind	Gear
Chests	1
Big chests	1

From the official guides

You can hook onto pots, treasure chests, blocks, and the like across a pit and pull yourself over. On some monsters it can also do damage or stop them moving.

任天堂公式ガイドブックゼルダの伝説神々のトライフォース上巻 (小学館, 1992), p. 25, translated by 101Leafy

Official art

What it's for

It flies 4 pixels a frame for up to 32 frames, then comes back. It catches on pots, chests, torches, and things Link can lift, and pulls Link over to them. If it catches in its first 4 frames, it lets go without a pull.
Solid tiles that stop Link send it back without a pull. Pits and deep water do not stop it.
From the shot until the pull ends, enemies that touch Link do no harm. Link is pulled over pits and deep water, and only where the pull ends does he fall into a pit or start to swim.
It catches Hearts, Rupees, Bombs, Magic Jars, Arrows, Fairies, Small Keys, Big Keys, and shields lying on the ground and brings them back to Link.
A Piece of Heart, a Heart Container, the Mushroom, the Book of Mudora, the fake Master Sword, bees, and apples stop it, and it comes back without them. They stay where they are until Link touches them.
When it hits an enemy, it comes back without a pull. What the hit does to each enemy is listed under "Enemies it works on".
Over a ledge it rises off the ground. While it is up, walls don't stop it, it flies past enemies, nothing catches it, and it is drawn above everything. Indoors the next ledge brings it back down. Outdoors each ledge of the same kind lifts it one level more and any other ledge takes it down one level. Corner ledges don't count.