Mahr 40AS 4134200 Blade Micrometer has a measuring range of 0-25mm with 0.01mm Readings, 0.04mm Error Limit and 0.5mm Spindle thread pitch. These micrometers feature a sliding spindle and measuring spades for measuring narrow recesses, grooves, etc. Hard lacquered steel frame for measuring ranges up to 50-75mm- 2-3". The spindle and anvil are made of hardened steel and the scales have a satin-chrome finish. Also includes heat insulators, a rapid drive with integrated ratchet and a case. Specifications Range: 0-25mm Graduation: 0.01mm Type: Mechanical, blade Accuracy: 0.004mm Graduation: 0.01 mm Micrometer Range 25-50mm Type of Micrometer Mechanical Outside Micrometer Select Micrometer Type Spline Mechanical Graduation .01mm Digital, Non-Digital Non-Digital Micrometer Series 40AB Micrometer Accuracy .004mm Ratchet Type Ratchet Stop Additional Details Code=4134101, Anvils=3mm, Length= 8.5mm