Strong and reliable for long-term use: The pen holder is made of metal, designed for durable performance. The adhesive backing provides convenient attachment and is suitable for most applications. Retractable ring design: Features an adjustable spring ring made of manganese steel. Each ring expands from 7 mm to 18 mm in diameter, accommodating most pen and pencil sizes. Generous quantity included: Pack contains 10 adhesive pen holders. Compact and lightweight, they are easy to carry and store, providing ample supply for everyday needs. Practical and thoughtful gift: A useful accessory for colleagues, teachers, friends, doctors, nurses, and more. Helps simplify daily routines. Wide application: Can be attached to dry, smooth surfaces such as whiteboards, refrigerators, wipe boards, bulletin boards, maps, and calendars. Ideal for organizing shopping lists, pens, pencils, and other small items, helping keep essentials within reach. Color: Black Material: Metal Size: Clip width 18 mm Package Contents: 10 x Pen Holder Note: Small parts. Not suitable for children under 3 years. Items shown in pictures not included except as specified above. Color may vary slightly due to lighting and monitor settings. Measurement error allowed within +/- 1-3 cm.