PREMIUM MATERIAL: Made of premium strong metal, metal clamps in the package are durableandrust-resistant. Office clips provide extra strong hold without slipping or releasing of your papers or crafts. 
WIDE APPLICATION: These colored binder clips can hold papers or documents together steadily based on different thickness. The paper clamps can also be used for daily DIY, office, making bookmarks, photo albums,cable, business card holders and envelope clips, etc.