Cellular, foam or aerated concrete is a concrete product with gas bubbles in it, making the material light, strong and easy to work with with the aerated concrete handsaw and with the stonemason's French drag.
The aerated concrete handsaw has a thick (approx. 1.5 mm) tapered blade (approx. 50-70 cm). The large carbide (widia) teeth (30-40) are angled forward, so they saw when pushing the tool.
See also the handsaw. [MOT]