Which is why it's only used in certain parts that would benefit from having glass filling, like tools for instance. You also pay for it anyways; I would be sur

Which is why it's only used in certain parts that would benefit from having glass filling, like tools for instance. You also pay for it anyways; I would be surprised if any of the consumer grade Ryobis from Home Depot had glass fiber reinforced polymer cases, while a Hilti almost surely does if not metallic.