An ingenious invention, this caliper is similar to a caliper tool a sighted person might use except it is in braille.
* As you slide the measuring tool down the ruler, the braille refreshes.
* This plastic caliper measures to 1/16 of an inch and is 15 inches long, which makes it easy to take on the go.
* Add this incredibly useful device to your tool kit at home, in the garage or for your next big project.