... ,3,4,5,6,8,10,12 LB non-sparking safety tool copper hammerThey are mainly used in hazardous environment where flammable ... .There is two kinds of material,Beryllium Copper alloy and Aluminium Bronze.Specification: Material: fiber handle+ copper headSize: 1,2,3,4,5 ... .80KG6LB=2.7KG8LB=3.6KG10LB=4.5KG non-sparking hammer, copper hammer