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The Freud SD508 is an 8-inch stacked dado set with 24 carbide teeth and six chippers, sized for cutting grooves, rabbets and dados in a table saw. Its two outer blades carry Freud's Silver Ice coating, and the stack uses metal shims to fine-tune width. It is aimed at furniture and cabinet makers who want clean, flat-bottomed cuts in plywood and hardwood. Against cheaper stacked sets it is known for smoother shoulders and less tear-out, but it is heavier and pricier than a wobble dado or a single-purpose blade.
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Lowest price we've seen: $203.22 on Nov 10 at Amazon. Tracked across 1 store since Nov 10.
Owners and reviewers rate the SD508 as one of the better stacked dado sets for clean joinery. They praise flat bottoms and clean shoulders in plywood, and note the shims and chippers give useful width range. The main complaints are weight and the fiddly shim setup.
