ITEM NAME:R1-6.5mm Pocket Measure Tool 32 Leaves Radius Gauge Gage D4N9 R1-6.5mm Pocket Measure Tool 32 Leaves Radius Gauge Gage D4N9 Standard: R1-6.5mm Blade Number: 16 Pcs x 2 Ends Material: Metal Folded Size(Approx): 7 x 1.3 x 0.9cm / 2.8'' x 0.5'' x 0.35'' (L*W*T) Net Weight: 49g; 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, 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. Package Content: 1 x Radius Gauge Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.