CMT 794.207 3-Pcs HS Planer and Jointer Knives, 8-1/16-Inch Length Knife size: 8-1/16-inch in Length, 13/6-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.