Grater (1) having at least one friction surface for rubbing off friction material which is formed from a sheet (2) having a friction pattern with a first and second surface (3, 4) and the friction pattern comprises a plurality of paired recesses (5, 6, 5 ', 6', 5 ", 6", ...) with opposite pointing in opposite directions Reibkanten (7, 8, 7 ', 8', 7 ", 8", ...), wherein the paired recesses ( 5, 6, 5 ', 6', 5 ", 6", ...) are separated by webs (9, 9 ', 9 ", ...), characterized in that the friction edges (7, 7', 7 ", 8, 8 ', 8", ...) are arranged planar to the first surface and the angle (α, α', α ", ...) at the Reibkanten (7, 7 ', 7", 8 , 8 ', 8 ", ...) are in the range of 80 ° to 110 °.
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