CMT 794.161 3-Pcs HS Planer and Jointer Knives, 6-1/8-Inch Length Knife size: 6-1/8-inch in Length, 5/8-inch in Height and 1/8-inch in thickness. Suitable for cutting dry softwood, dry and wet hardwood. Carefully ground from fine European high speed steel. These knives produce high quality finish.