Trestle Pine Knives Gunflint ~ Old Growth Yellow Birch HandleCPM154 Wharncliffe Blade. Long PullHalf StopBrass Bolsters, Pins, Liners, End Cap3.625′ OAL Closed6.375″ OAL OpenWt Approx 2.1 ozThe Old Growth Wood is a product of logs that were harvested over 100 years ago. This particular wood came from trees that had sunk, after being harvested, in lakes and rivers of Canada and the Northern US. Some of this wood carbon dates to the 1300’s and is highly prized by musical instrument makers and custom furniture builders for it’s tight grain and high density. It is a very unique wood product.