7-piece set. Used for accurate outside measurement of small objects. Comes with 4 individual outside micrometers of 0-25; 25-50; 50-75 and 75-100mm. Complete with 3 ''Standard'' gauges of 25; 50 and 75mm length. These gauges are used to check and set the micrometers for correct measuring. The Standard gauge lengths are fixed and manufactured; like the micrometers; according to DIN 863. Includes: - 4 outside micrometers of 0-25; 25-50; 50-75 and 75-100mm - 3 Standard gauges 25/50/75mm - carbide measuring faces; ground and lapped - scales satin chrome no-glare finish - lightweight coated frames - spindles Ø 6.5 mm - thread pitches 0.5 mm - scales 0.01 mm - with auto-stop ratchets - accuracy DIN 863 - in wooden case - weight: 2.1kg