It’s funny how even the most mundane tool has specialty subcategories. When we started quilting we bought a magnetic holder with “regular” pins. My wife saw the flower head pins and had to have them, so we bought those and used them exclusively for a long time. One of our local shops got a great deal on some pins in a disc and they encouraged us to buy a set because they were such a bargain. We used them for a bit but the shaft was too thick and they caused our patchwork to be off so we retired them. Then I bought a set of the very fine glass head pins because I was doing some precision work and wanted some pins that caused minimal distortion. Last but not least, a friend gave me a set of corsage pins for the long arm. We must be quilters.