🔍 SpeTool sleds are built from robust materials – for instance, the rails are made of **6061 anodized aluminum**, which is strong and won’t warp:contentReference[oaicite:33]{index=33}. The construction includes a rigid frame that doesn’t flex under the weight of the router. Everything is bolted securely, and the carriage glides on the rails with minimal play. The Cratos PRO has laser-engraved markings and preset positions, which not only help with accuracy but reflect the precision of the build. Stability-wise, if you set it up on a solid base (like a level table or sawhorse setup) and clamp your workpiece, the sled will stay true and not wobble. Also, aluminum means it’s durable but still relatively light to handle. Many users note that the sled feels **solid and well-engineered**, which translates into smooth flattening without chatter.

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