Abstract: Apparatus for splitting blocks, the apparatus comprising a base (1) which supports a blade (2) with its splitting edge protruding a distance no greater than 5 mm above the base surface, guide ways (4) upstanding from the base (1) and positioned one to each side of the blade (2), and an opposite bladed member (5, 6) movable between and within the guide ways (4) along a vertical path which contains the respective edges of the blade (2) and the bladed member (5, 6). The surface of the base (1) is formed with corrugations (3) which extend in a direction normal to the edge of the blade (2). The base includes an upstanding wall lying to one side of the blade (2) and being provided with markings in the form of a rule.