#chisel  an edge tool with a flat steel blade with a cutting edge
  supertype:  edge_tool  any cutting tool with a sharp cutting edge (as a chisel or knife or plane or gouge)
  subtype:  burin  a chisel of tempered steel with a sharp point; used for engraving
  subtype:  cold_chisel__set_chisel__setchisel  narrow chisel made of steel; used to cut stone or bricks
  subtype:  drove_chisel__drovechisel__drove  a chisel with a broad edge for dressing stone
  subtype:  firmer_chisel  a chisel with a thin blade for woodworking
  subtype:  ripping_chisel__rippingchisel  a long chisel with a slightly bent cutting end; used for heavy prying or cleaning mortises
  subtype:  wood_chisel  a chisel for working wood; it is either struck with a mallet or pushed by hand

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