A surform tool (also surface-forming tool features perforated sheet metal and resembles a food grater. A surform tool consists of a steel strip with holes punched out and the rim of each hole sharpened to form a cutting edge. The strip is mounted in a carriage or handle. Surform tools were called "cheese graters" decades before they entered the market as kitchen utensils used to grate cheese. Surform planes have been described as a cross between a rasp and a plane.
Although similar to many food graters made of perforated sheet metal, surforms differ in having sharpened rims. Also, a surform typically is used to shape material, rather than grate it.
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