This is a particularly frequently used part among the metal fittings that connect parts together. By placing the end between the metal fittings and fasteners that are being processed, the movement will be smoother. We recommend thick rings when you want to make durable items such as miscellaneous goods or when connecting heavy parts, and thin rings when making delicate accessories. The 0.45mm wire diameter is made of nickel silver, making it durable and suitable for delicate accessories. *The number of items is a guideline. Because items are weighed and packaged by weight (g), there may be slight differences in the number of items even if they are the same size depending on the lot. Please note.