Inside Micrometers Precision manufactured to BS959
Accuracies of 0.01mm/0.0004in.
ranges of 50 to 300mm/2 to 12in.
Each set consists of a micrometer head with locking screw, 10 range identified measuring rods, 12mm/ 1/2in. lapped collar and 2 adjustment spanners
The micrometer has 13mm/ 1/2in. movement graduated (0.01mm/0.001in.)