Are plastic knuckles effective because where I live brass/metal

Are plastic knuckles legal in Canada? - Quora

A Beginner's Guide to Brass Knuckles!, by Ashlybrine

Things I Do with My Brass Knuckles, by Hannah Baker

Why are brass knuckles illegal where pistols and semi-auto assault-type rifles are not? - Quora

Stealth Knuckles™ - 100% Non-Metal - $28.98 : Brass Knuckles

Full Brass Pumpkin Face Two Finger Brass Knuckles

In What Ways do Brass Knuckles Benefit You?, by Jairus Nadab

What are the differences between paperweight brass knuckles and regular ones? - Quora

Why are brass knuckles illegal in some states but knives aren't? - Quora

What's the best object to use as 'sleeper' brass knuckles? All I can think of are extra large carabiners. - Quora

Brass Knuckles: A Misunderstood Self Defense Tool?