Concrete blocks are generally cut using the same method as for bricks, with the bolster chisel and lump hammer. It is usual, however, to have to cut the block on all four sides before hitting it hard enough on its bedding face to break it. Aerated concrete blocks can also be cut with a bolster chisel and hammer but the material, which is less dense, tends to absorb more of the impact shock and does not crack as easily or as accurately as a concrete block or a brick. The simplest and most accurate method of cutting aerated blocks is to use a masonry saw or even an old joinery panel saw. The material is soft and offers so little resistance to cutting that an aerated block is easier to cut than most timbers.