Pool Filter Lock

Seems they no long make a filter tightener for the type of pool filter canister I have - so here is one. Time will tell if it withstands the Sun, chemicals and time.
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9/15/13
Seems was not as robust as planned - so - here is version 2, It is slightly thicker at the nut-capture, as that area was cracking - also made the hole for the nut slightly smaller and then used the technique of a hot soldering iron to melt the nut into the tighter hole.

And changed from 4 finger grips to 3 finger grips (4 was too many got in the way), are a little longer as well.