... 7.8%), red (hit) strike, friction drop hammer produces no sparks explosion.Beryllium copper alloy non-sparking tool is synthesized ... safety, red (hit) strike, friction drop hammer produces no sparks explosion. Beryllium copper alloy explosion-proof tools also have ... "spark-proof" tools are names given to tools made of metals such as brass, bronze, Monel metal (copper-nickel alloy), copper-aluminum ...