I make many Yakutian knives (I’ve made about 100 knives so far). I normally take Leonid Yasinetsky blades for my Yakutian knives. Different steels, normally I use М390 and N690Co (Leonid Yasinetsky forging and heat treatment).
For handles I choose premium materials, quality stabilized wood, exotics like Ironwood, Cocobolo, Ebony, mammoth tusk, mammoth teeth, walrus tusk, sometimes signature micarta or G10.
I make sheaths only from Italian vegetable leather (I buy leather directly in Italy).
I also make wallets and belts.
p.s. I do not make cold arms!