What are you even trying to say? If pins are available on amazon who cares, secondly I draw with slin pins all the the time and pin with the same needle?
You sound like you have head trauma.
The pins on Amazon are complete garbage and nowhere near the quality of what you’d buy at a medical store. You can’t take off the needle on a slin pin, but if someone is drawing and pinning with the same hypodermic needle, they’re retarded.