The Stone Miter Clamp is a professional 45°/90° countertop seam-splicing fixture engineered for precise jointing of both natural and engineered stone. Designed for granite, marble, quartz, and quartzite, this clamp holds two pieces securely while adhesive cures—creating tight, seamless mitered edges every time.
This fixture features a maximum clamping height of 13 cm, an overall size of 32 × 20 cm, and a 6 inch opening. It can create clean, accurate miters up to 5 1/4 inches, making it ideal for modern edge builds, waterfall legs, corners, and custom fabrication work.
Its unique dual-lever design uses an adjustable spring-tension system, giving fabricators full control over pressure and alignment. The bottom work surface is lined with white rubber to protect polished stone from scratches and slipping during tightening.
Whether you're fabricating in the shop or installing onsite, this miter clamp provides the precision, alignment, and stability professionals rely on.
Features
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45° / 90° miter clamping system
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13 cm maximum clamping height
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32 × 20 cm size (6 inch opening)
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Cuts / forms up to a 5 1/4 inch miter
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Two binder levers with adjustable spring-tension control
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White-rubber protective work surface
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Provides tight, accurate alignment for seamless joints
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Heavy-duty construction for shop or field use
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Works with a wide variety of stone thicknesses
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Reduces labor and improves consistency
Applications
For jointing:
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Granite
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Marble
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Quartz
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Quartzite
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Engineered Stone
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Porcelain / Ceramic
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Glass
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Concrete
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Other rigid materials
Perfect for:
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Countertop miter edges
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Waterfall legs
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Corner seams
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Backsplashes
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Decorative stone builds
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Professional stone fabrication
How to Use
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Place the wider stone piece on the fixture’s white-rubber pad.
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Position the narrower stone piece against the 90° inside wall.
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Apply adhesive to the miter joint.
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Tighten the dual adjustable levers to pull the seam together.
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Allow adhesive to fully cure before removing clamp.
