Do more complex math equations easily and efficiently.
Package Weight: about 0.7 ounces.
Don't let this product's somewhat technical name scare you off ... It's really quite simple. This is just an aluminum frame with two open sides - each of which you slide one end of a Math Abacus into. By so doing, you will end up with two abaci attached together, end-to end, meaning you'll have a total of twenty-six columns to work with, instead of the standard thirteen you'll get from only one abacus. This might seem like a lot of columns and even more beads, but when you're working out an in-depth long division problem, or just want to use one abacus to "write down" one part of a problem while you work out the second half, it's mighty handy to have both abaci in one place - and all those beads readily accessible at your fingertips!