I think whether something is a knuckle duster or not is whether it falls under the definition of section 141(a) with the criminal justice act 1988.

Also, the ring on a karambit knife is designed to prevent the knife coming out of the hand of the user rather than as a knuckle duster. However, my experience of Filipino martial arts is that they do teach using the ring part of the knife as an impact weapon, so I could perhaps understand why it might’ve been described as a knuckle duster although it’s technically not used in that way.

You might want to find a Filipino martial arts instructor in your area if there is one.

Yours sincerely

Carl Woolf
Woolf Law Consultancy

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> On 16 Sep 2025, at 15:22, Angus Mathieson <angusmathieson66@gmail.com> wrote:
>
> Hi,
>
> Does anyone know of a good knives expert for person charged with possession of prohibited knives in private place?
>
> The knives in question have been described as knuckle dusters as the reason for being prohibited but I have doubts as to whether they should be so described. One is described as a Karambit.
>
> Also any useful case law on this would be appreciated.
>
> Kind regards,
> Angus Mathieson
> Sent from my iPhone
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