I purchased this about two years ago and opened it, but I've never used it. It's a clip that you can attach to your planner or notebook to hold a pen. ○ Clip Size Approximately 6cm long x 2.5cm wide (at its widest) x 1cm high Compatible with thicknesses up to approximately 3mm The usage instructions are shown in the third image. This item will be sold as is. Please understand the above before making a purchase. Also, I am not offering any discounts on this item.