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If you jam these onto...
March 31, 2014
Verified Purchase
If you jam these onto the cap as far as you possibly can, then they will probably stay on for a fairly long time, but if you trust them to hold a bullet Space Pen in your shirt pocket, eventually you'll be disappointed. I've had years of experience with these, and sooner or later they come off when you least expect it. I keep a bullet Space Pen in a pants pocket, and this clip is mainly useful for keeping the pen from rolling off a table if I put it down there.
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