In my thinking a PSK is a SHTF item, when you really need it something has gone terribly wrong. I have a number of PSKs from a tiny PSP sized one to a Large Fanny Pack, all have a blade of some kind in them the Fanny pack has two! If I need my PSK, it is quite posible that I have broken or lost my EDC knife.
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"Trust in God --and press-check. You cannot ignore danger and call it faith." -Duke