Target Bimetal Saw Crown - Measurement: " 121 mm. -Made of an alloy with high hardness and resistance to wear. -Thermally tempered teeth, which gives high stability to the cutting edges. -Reinforced crown base. -Side holes for chip evacuation and better cooling. -Ideal for making holes in mild steel, stainless steels, cast iron, brass, aluminum and wood. -Article known as wood drill bit, wood hole drill bit, wood saw, wood hole saw.