Features ABS Material These spiral binding spools are durable and strong, allowing you to easily compile paper and can be used for a long time in normal operation. Easy to carry: these spiral binding spools are very convenient to carry, you can wear them on your body at any time when you need, when you don't need them, they will not take up much space when stored. Applicable scenes: any office, student, private can easily operate, if you have related needs, then this one is for you. Binding method: drilling the right holes can be connected manually or with instruments, very friendly for novices, not too difficult. Good colorful and shiny: good gloss exterior, strong adhesion, wear resistance, rust resistance, aging resistance, not easy to fade, turn the page, can be used repeatedly. Specification: Item Type: Spiral Binding Spools Material: ABS Inner diameter: approx. 11mm / 0.43in Application: Stationery Accessory Binding Supplies Package list: 20 x Spiral Binding Spools Package List 20 x Spiral Binding Coils