Large quantity: the package contains 10 pieces adhesive pen holders, small and lightweight, easy to carry and store, enough quantity to cater users' needs Expandable loop: these manganese steel pen holders feature adjustable spring loops, each loop can be expanded from 7 mm to 17 mm in diameter, allowing to hold most size of pens or pencils Durable material: these pen holders are made from manganese steel, can be applied for a long time; Adhesive back design brings convenience to apply on most occasions Wide applications: these pen holder clips can be stuck on the whiteboard, refrigerator, erase board, bulletin board, map, calendar and other dry surfaces, even good helpers to hold shopping list, pens, pencils and so on Practical and considerate gifts: these adjustable spring pen holders are useful to coworkers, teachers, friends, doctors, nurses and so on, nice gifts to make their life easier