Stainless Pen Holder Clip for Notebook and Clipboard with Spring Fits Almost All Pen Size,10 Pack from Devis Carry Everywhere - The pocket clip can be attached to clipboard and binders,keeps your pen handy all the time Adjustable Diameter - The spring expands to hold different size pen and pencil,from 7 up to 18 mm. Clip dimensions: 40*10 mm. Durable and Stylish - Made of high quality material,offering you a better experience with our product Great Value - Come with 10 pack pen holder clips,share them with your family friends and colleagues Good Choice - Ideal for doctors, nurses, teachers, pilots and other professionals ,can clip on uniforms and pockets, or on clipboards, calendars. Also great for shopping list pads or sketch books.