Non Sparking Wrenches Bung Wrench non Sparking Wrenches Bung Wrench Material of Composition Aluminium Bronze Alloy Sparkless ® Non Sparking Tools are Most Suited For Application Purposes In Potentially Explosive Environmenmts.Most of our Non Sparking Tools are Forged after Casting to achieve better Quality, Performance & Attractive Finish. Category: Bung Wrench