Binder clip
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Binder_clip_side_view.jpg
Binder_clip_side_view.jpg
A binder clip
A binder clip is a primitive device for holding things together. Usually this would be many pieces of paper. A binder clip is a piece of metal shaped like an isosceles triangle with loops at the apex. Into these loops, two U-shaped pieces of metal are inserted so that the clip can be opened. Tension along the base of the triangle force the two sides closed. There are 3 sizes of binder clips that are common to the modern office. A small clip measures 9 mm at the base and 38 mm with the U clips flipped in line with the apex. A medium clip has a base of 15 mm and is 56 mm tall.
The binder clip has replaced use of the paperclip for large volumes of paper (e.g. documents of 25 or more pages.)