Heavy duty: Made of Metal solid holds papers, not easy to bend but easy to use, durable, Excellent tight secure grip after being used over and over.functionality.They have the right about of bend-ability, while still retaining enough rigidity to securely hold many sheets of paper.The metal is thick enough so that it doesn't bend out of shape too easily. Must have in the work place, also great for home,office or daily at school.Handy for so many other uses -- clipping together notes, receipts, recipes, coupons for your shopping needs .They are organizing tool wherever paperwork(documents ) is being done. A multitude of arts and crafts projects need paper clips. These will comfortably clip 30 sheets of paper together. SIZE:Length:2”(50mm),Width:0.4" (10mm), Thickness:1mm. These paper clips are nickel galvanized(bright, shiny Gold) for corrosion resistance. Now you can have control of your documents and organization!