Type: singly. in foil Content: 21 blades Measuring range: 0.05 - 2.00 mm / inch Composition: 0.05-0.10-0.20-0.30-0.40-0.50-0.60-0.70-0.80-0.90-1.00-1.10-1.20-1.30-1.40-1.50-1.60-1.70-1.80-1.90-2.00 mm for standard purposes. like thickness measuring between narrow slots and for automotive- and engine industry ; hardened spring steel. conical shaped blades. 100 mm length ; nickel plated case with lock nut. sizes in mm and inch on each blade ; thickness tolerance in relation to the metric sizes made in china