Sealey digital external micrometer 0 12 7mm 0 0 5 sealey ak9638d digital micrometer with spring loaded satin chrome pin easy to read lcd digital display with auto off feature zero display in any position for relative and tolerance readings display switchable between metric and imperial units includes serial port connection for computer interface sealey ak9638d digital external micrometer 0 12 7mm 0 0 5