Festool 485331 HL 850 Rustic Planer Head, Undulating Undulating Rustic planer head with blade for creating a scalloped, or hand-hewn effect in solid wood Spiral cutter engages the material with a slicing action, similar to that of a skewed angle hand plane, generating less chatter and a smoother cut Self-aligning blades for quick and easy blade changes - loosen 3 screws, replace the blade, re-tighten screws and you're done. Simple as that. Durable, precision ground HSS spiral-cutting blade generates consistent results over a long service life Precision-balanced machined aluminum head for smooth, vibration-free planing