The Moore & Wright Traditional External Micrometer has a pearl chrome plated frame with insulation pads, tungsten carbide measuring faces and a tapered bow frame. The 'speeder' type ratchet, locking lever and adjusting key make this micrometer easy to use. It has a 6.5mm spindle diameter. The micrometers are manufactured to BS870, DIN 863/1, ISO 361 standards. Supplied in plastic pocket case. The 1961M Traditional External Micrometer has the following specification Micrometer Range 0-25mm. Measuring Faces Flatness 0.001mm, Parallelism 0.003mm, Accuracy 0.003mm. Resolution 0.01mm.