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efco dueren tools are made of copper alloy. Due to the good thermal conductivity of copper and its characteristic of being almost carbon-free, the heat generated in a short time when the tool rubs against or impacts an object is absorbed and conducted. Another reason is that copper itself is relatively soft, providing good compliance during friction and impact, making it difficult to produce tiny metal particles. As a result, we hardly see any sparks, so explosion-proof tools are also called non-sparking tools. The material of explosion-proof tools is based on beryllium bronze and aluminum bronze. Beryllium copper alloys and aluminum copper alloys do not spark upon impact or friction, making them very suitable for use.