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Cranmer Abacus

Cranmer Abacus

It's a traditional abacus that fits in your pocket! Use it for basic arithmetic or even calculating square and cube roots. Each rod is marked with a raised dot so everyone can use it, including people with vision loss.
- Black plastic frame with 13 rods
- White sliding beads
- Includes coupler to link two devices together for very large values
- 6.1 inches by 3.3 inches by 0.4 inches (15.5 centimetres by 8.5 centimetres by 1 centimetre)