Granite Surface Plate

Improve Your Measurement and Achieve Perfect Flatness! Nice grade of granite slab for my primary home use of block sanding and refurbishing small machined part surfaces with fine sandpaper. My slab appears to be very flat. Good value for the price.--Steven Why Buy the Granite Surface Plate?  ✅Flatness Measurement: Granite surface plates are precision tools used for measuring flatness, squareness, and other geometric characteristics. They serve as a stable reference surface for inspecting, calibrating instruments, checking parallelism/perpendicularity, and measuring heights with a height gauge. ✅Key Features: These plates are precision ground with a flatness accuracy of ±0.0001" (Grade B, Grade 1), meeting Federal Specifications GGG-P-463C. They are non-magnetic, non-conductive, harder than steel, and resistant to nicks and burrs. ✅Material Benefits: Made from quartz-bearing black granite, these plates are more wear-resistant, inherently stable, and rust-proof. Granite offers exce