Tersa Carbide planer knives are the perfect match for daily and extended use with all hardwoods, exotic woods and material with glue lines. Although the carbide steel is more brittle than high speed steel, if used on clean wood, it typically lasts 8-10 times as long.
For softwoods, HSS blades are recommended. Not sure which Tersa knife to
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Al’s woodworking
The carbide blades are a little pricey, but machine the hardest wood effortlessly and produce an excellent finish that doesn’t need any additional sanding.