Design:there is a stud in each metal clip,and a spring in the middle of the metal clip,you can force the tail to hold the picture or other items,and then applied the stud on the cork boards,very convenient for you to use. Size: 3.1x3x0.9cm/1.2x1.18x0.35inch;Pin length: 0.9cm /0.35inch;made of heavy-duty metal material,sturdy and durable to ensure toughness smooth surface.The push pins can be used on tough surfaces without bending pins or falling off. Advantage:the push pins clips are upgraded to avoid leaving defect on the stuff that we don't want to damage.You just need to clip the stuff you want to display and then push them on.And the clips can hold the stuff steadily,no worry about falling. Application:Perfect for DIY crafting and decorative accessory,great for organizing your documents and paperwork:data sorting,office management,test paper classification, photos/drawings/maps/price tags display,even serve as coffee/tea/food bag clips, so that your office,school and home life is efficient and colorful.Products from GuanGuan's store