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I have a small window with security bolts which have become rusted and unusable. However, I can't see how to remove them without forcing them off and damaging the wood. Anyone seen these types before and / or know how to remove properly? I scratched away some paint and can see the make 'Ingersoll security'.

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Have you looked at the underside of the bolt? –  The Evil Greebo Jun 30 '14 at 13:47
yep. Couldn't see anything obvious but thanks for the suggestion. –  codecowboy Jun 30 '14 at 13:57
Try tapping it with a hammer towards the window frame. I bet it's on a clip that's designed so that it can't be installed/removed without having the window out of the frame. You have enough wiggle room there to test the hypothesis. –  longneck Jun 30 '14 at 20:13
Is this a casement window? –  The Evil Greebo Jun 30 '14 at 20:28
If all else fails, just slide a hacksaw blade behind it and start cutting toward the jam. You'll probably take off some paint or mark the wood a bit, but it should be easy to repair (certainly easier than ripping it out with a prybar). –  Comintern Jul 1 '14 at 0:22

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