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. *As this is an accessory, the color may be changed to reflect changes in fashion. Also, during the processing process, color shading may occur without prior notice. (Some parts may differ in color from other parts.) *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.