Snap hook

What is a snap hook?

A snap hook is a hook whose opening is closed off by a sliding part, usually with a swivel eye at the back. The hook connects in one motion and comes off again with one thumb. In BDSM it sits on lines and collars, and on nothing that carries weight.

The origin

From a weapon, like the carabiner, but through a different weapon and a different language.

The etymological dictionary by Van Veen and Van der Sijs dates the Dutch musketon to 1667, and then as the name of an old-fashioned firearm of heavier caliber than a musket. The word comes through the French mousqueton from the Italian moschettone, the augmentative of moschetto. Only somewhere between 1926 and 1950 is the meaning recorded that everyone knows now: the little hook with a spring. That shift ran, the dictionary writes, from the weapon to the fastening hook on the bandolier.

What a snap hook promises

Nothing, and that is not sloppiness but a fact about the hook.

Dutch law requires lifting and hoisting gear to carry its working load: under Article 7.20 of the Working Conditions Decree, such gear, unlike ropework or steel cables, carries a clearly legible marking stating the working load, and is checked at least once a year by an expert. A hook that hangs on a leash in the pet shop falls outside that whole world. There is no number on it, nothing about it has been inspected, and so nothing is promised either. For guiding someone who stands on their own feet that makes no difference; for anything that has a body hanging from it, it does.

Why people use a snap hook

For the speed, and for the swivel eye.

You push a sliding bolt open with one thumb, even when your hands are slick with oil, and the swivel eye keeps a line from winding up on itself while someone moves. That is exactly what you want on a collar: off in a second, without fumbling with a knot. The word guiding is where the limit lies. As soon as something has to do more than move along, so hanging, tightening, fixing a wrist to an anchor point, there should be material with a stated strength in between. That is the moment the snap hook comes off and something with a number on it goes on.

Where this fits on this site

Small gear rarely comes up until the moment something hangs from it. How I handle a collar, line and chain and what we set down in advance is on the BDSM date.

Sources

• musketon. Etymologiebank, hosted by the Instituut voor de Nederlandse Taal, with the entry from P.A.F. van Veen and N. van der Sijs, Etymologisch woordenboek: de herkomst van onze woorden, 2nd edition (Van Dale Lexicografie, Utrecht/Antwerp 1997). Gives the dating 1667 for the weapon sense, the dating 1926-1950 for the sense “little hook”, the borrowing through the French mousqueton from the Italian moschettone as the augmentative of moschetto, and the point that the meaning passed from the weapon to the fastening hook on the bandolier.
• Working Conditions Decree, Article 7.20. Dutch legislation, text in force as of 1 January 2026, published on wetten.overheid.nl. Gives that lifting and hoisting gear, unlike ropework or steel cables, carries a clearly legible marking stating the working load, and that such gear is checked at least once a year by an expert for its good condition.
• Musketonhaak. Dutch-language Wikipedia. Gives the description of the snap hook as a hook with a sliding part that closes the opening completely, the use where a connection has to be made quickly, and the difference from the carabiner, which has no sliding but a hinged part.

This tool term, too, leaves the source exemption unused: as soon as a page says something about what a hook does and does not carry, a source belongs with it.

Related terms

A snap hook is connecting hardware within bondage, the page where the practice and the arrangements are.

• Carabiner. The hinged cousin, and the only one of the two that exists in a rated form.
• D-ring. The fixed eye a snap hook clips into, on cuffs, collars and harnesses.
• Leash. The line this little hook sits on most.
• Collar. The other end of that same connection.
• Chain. Heavier connecting hardware, with the same question: what does it really carry?
• Panic snap. The third hook of the set, and the only one you can get open under load.