For the technically oriented, the buckles on the older K-5000's that took a beating for years and never failed were Fastex SR-1's
The buckles that came with the new pair I got toward the end of last season appeared to be cheap knock-offs - sure glad I discovered that on the walk in rather than perched on a rock in a big swell in the dark...also known as the hard way...
The replacement buckles and straps I picked up from Joe Lyons at SRI this afternoon were the stronger Fastex SR-1's -
Okay, alright, maybe a little much...but ya know, it might save someone stitches some night