12-POINT BOX END - Precisely manufactured 12-point offset box end and 15-degree angled open end for easy access to fasteners in tight spaces FIELDS OF APPLICATION - Used primarily by the petrochemical and similar industries, mining, chemical, paper, pyrotechnic, military, aerospace as well as in the manufacture of weapons and ammunition, paints, alcohol processing, plastics, etc. PREVENTIVE MEASURES - Use of non-sparking tools should complement other preventitive measures, and other objects such as clothing, footwear, and face material must also comply with non-sparking specifications. BRONZE-ALUMINUM ALLOY - This metallic composition allows these wrenches to meet the characteristics needed for their performance without causing sparks. Bronze-aluminum alloy means that these tools do not have the hardness of the tools manufactured with alloyed steels, so you should avoid subjecting them to overstrain and keeping them away from high temperatures. 100 YEAR WARRANTY - Pros need tools they can depend on, that's why we offer a 100 year warranty against any manufacturer defect on all Urrea mechanics wrenches and wrench sets