[DrGunsforHands]

Needles are stainless steel, which is non-ferrous and is not attracted to magnets.

[ConservativeMind]

Interesting. The most common ones do use

“SUS 304” steel used
https://www.gbo.com/fileadmin/media/GBO-International/02_Downloads_Preanalytics/SALES_Application_Notes/PIENN01_Needles_R00.pdf

“SUS 304” steel is an “austenitic stainless steel:”
https://en.m.wikipedia.org/wiki/SAE_304_stainless_steel

[TexasGator]

“Needles are stainless steel, which is non-ferrous ...”

-———————Fact-———————

Ferrous Metals Contain Iron

Simply put, ferrous metal is any metal that contains iron or steel. Things like construction scaffolding, automobiles, buildings, power tools, and more are made from ferrous metals. Carbon steel, stainless steel, cast iron, wrought iron, mild steel, and any other forms of steel and iron are examples of ferrous metals.

https://www.gardencityironandmetal.com/blog/what-does-ferrous-mean/

[higgmeister]

TexasGator already set you straight.   But this is a cut-n-paste from another Internet site:

There are basically two kinds of metals: ferrous and non-ferrous. Ferrous metals include mild steel, carbon steel, stainless steel, cast iron, and wrought iron. Non-ferrous metals include aluminum, brass, copper, nickel, tin, lead, zinc, and precious metals.

The Dictionary.com word of the day is nincompoop which seems fitting on April Fools' Day.