Planer Head HK 82 SDStandard, smooth planer head with blade for chatter free planing 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 make for quick and easy blade changes loosen 3 screws, replace the blade, re tighten screws and you're done. Simple as that. Durable solid carbide spiral cutting blade generates consistent results over a long service life