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→Screw posts
==Screw posts==
==Screw posts==
Screw posts could inserted into three hole punched paper. Publishers would use either two or three posts, depending on the stability they needed.
[[Image:Screwpost.jpg|thumb|screw posts]]
[[Image:Screwpost.jpg|thumb|screw posts]]
[[Image:Asidothee6tp.jpg|thumb|example in use ([[As I Do Thee]])]]
[[Image:Spocksscribes.jpg|thumb|example in use ([[Nimoyan-Spock's Scribes]]), note the center screw post is either missing or not in use]]
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