Made from recycled paper tightly wound around a recycled lead slip. Writes erases and sharpens just like an ordinary HB pencil. Grade HB. Pack of 144.In our independent testing the CLASSMATES HB pencils vs other brands came first in 2 out of the 3 tests including strength at the midpoint of the pencil which is where a pencil would normally snap. With further testing the CLASSMATES HB pencils vs other brands scored joint first on core centralisation which is essential when sharpening the pencil for use.*Independent testing carried out in June 2023.