The gauge is used to measure the radius of edges and corners. Graduated every 0.25mm or 0.5mm. R1-6.5mm standard with 16pcs leaves per end. Standard: R1-6.5mm Blade Number: 16 Pcs x 2 Ends Material: Metal End Type: Dual Ends Concave & Convex Arc Ends Color: Black, Silver Tone Folded Size: 7.2 x 1.4 x 0.9cm/2.8'' x 0.6'' x 0.4'' (L*W*T) Net Weight: 35g Radius gauges require a bright light behind the object to be measured. The gauge is placed against the edge to be checked and any light leakage between the blade and edge indicates a mismatch that requires correction. It is a kind of observational measurement because of its visual test way. R1-6.5mm includes 16pcs at each end, concrete radius as 1mm, 1.25mm, 1.5mm, 1.75mm, 2mm, 2.25mm, 2.5mm, 2.75mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm.
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