I was not smart enough back then to think of drain holes. The hole was put there for my 550 cord leg strap. I wear my knife through my rigger belt not my kit. Back in the 80's I used a 2 quart canteen strap around my waist with 550 cord leg strap. I figuered if you need to get light and shed everything at least I would still have my knife till the end.
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Jimmy Bedgood
RKCC# CM-050
RKS#5929
HOG Member
www.bedgoodknives.com