Shed Caribou Antler with Etched Steel Blade Ulu Knife. Naturally Shed Caribou Antler Ulu Knife by Alaskan, Bob Merry. Blade is made of Etched Steel . 5 1/2 wide *Stand is Included* Birch Ulu Board Sold Separately Ulus Have been Used in Alaska Since at Least 1900 B.C. This Knife is a Quite Versatile Utensil For Your Kitchen,Shop,or Outdoor Use.