Gem Setting Gauge

Comprising of 18 conical gem guages;Each hardened steel with blue plastic handles;Marked in mm 1 to 5;Carat points 1/2 to 50 for checking the size of the stone seat;(Carat point) sizes include: 1.00mm (1/2); 1.38mm (1); 1.63mm (2); 2.00mm(3); 2.13mm (4); 2.25mm;(5); 2.38mm (6); 2.50mm (7); 2.63mm(8); 2.75mm(9); 2.88mm (10); 3.00mm;(11); 3.13mm (12); 3.38mm (15); 3.50mm (17); 3.88mm(20); 4.00mm(25); 5.00mm(50);Stone gauge with 18 holes marked in both points and millimetres (1/2 50 points 1-5mm).;The unit consists of 18 gauges in the sizes for measuring the cut for the stone to sit in.;Setting burrs (ref: 119257 and size) with a 90 degree angle are available for cutting;a perfect seat corresponding to the measured size of the gem setting gauge.