Freud C351 6" (L) High Speed Steel Industrial Planer and Jointer Knives Built for professional shops and demanding production work, these Freud/Diablo C351 knives are engineered to elevate your milling and jointing results. Crafted from premium High Speed Steel, they’re ready to tackle tough woods and heavy-duty planing with precision and reliability.

• Premium High Speed Steel stock delivers exceptional edge retention and long wear life, so you can keep your machines cutting for longer between sharpenings.
• Pre-ground to a razor-sharp edge for a consistently smooth, clean cut on both softwood and hardwood, reducing tear-out and producing a high-quality finish.
• 6" length designed for industrial planers and jointers with exacting tolerances to fit standard 6" systems, ensuring a snug, vibration-free installation.
• Precision-cut geometry promotes even chip removal and a more uniform take-off across the board, improving surface quality and dimensional accuracy.
• Durable and wear-resistant construction stands up to heavy throughput, helping minimize downtime and blade replacement frequency in busy shops.
• Direct-fit replacement instinct for the Freud C351 lineup, so swapping in is straightforward without compromising performance or setup time.

Whether you’re resurfacing rough lumber, producing cabinet doors, or refining tabletops, these knives unlock a higher standard of cut quality. They’re ideal for professional woodworkers, cabinetmakers, and production shops that demand consistent finishes and dependable life from every blade. Tips for best results: ensure proper seating and alignment during installation, and pair with sharp, routinely maintained planers and jointers to maximize edge life and finish quality. With the Freud C351 6" High Speed Steel knives, you’ll notice cleaner edges, reduced chatter, and a more predictable surface across every pass.