verena 20 MM Spiral Binding Black Heavy Quality Plastic Spiral Ring/Coil/Loop Manual Ring Binder

Spiral-Bound Notebook: In office or school supplies, a spiral ring might be associated with a spiral-bound notebook. These notebooks have a coil or spiral running through the pages, allowing them to lie flat and be easily turned. Spiral Retaining Ring: In engineering or manufacturing, a spiral ring might be a type of fastener, like a spiral retaining ring. These are often used in mechanical applications to secure components on a shaft.