Rubi G3 Slab Cutter Supplement Guide — More Cutting Length, Same Accuracy
When the slab is longer than your rail, you're stuck — unless you can extend the track without losing the straight line. The Rubi G3 Supplement Guide is a 44-1/8" (112 cm) add-on rail that connects to your existing Rubi Slab Cutter G3 rails to increase cutting length, so you can score full-size slabs in one continuous, accurate pass.
Two integrated mechanical suction cups lock the guide to the tile surface, and the natural-rubber cups grip on textured and rough surfaces while protecting delicate finishes. An extruded-aluminum body keeps the rail rigid so the extension doesn't introduce flex or wander. Pair it with the Extreme scoring wheel for the toughest slabs.
Why Tile Pros Choose It
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Extends your reach: 44-1/8" (112 cm) add-on for longer slabs
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Keeps it accurate: Connects to existing G3 rails without losing the straight line
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Locks down: Two integrated mechanical suction cups secure it to the tile
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Grips and protects: Natural-rubber cups work on rough surfaces and spare delicate finishes
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Rigid: Extruded-aluminum build resists flex across the extension
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Full-slab capability: Score the whole length in one pass
Pro tip: Wipe the slab clean where the cups land and confirm both are fully locked before you score — a cup that releases mid-pass ruins the line. Sight down the joined rails to make sure they're dead straight before committing the cut.
