Sets of 1/2“, 3/4” and 1” Non-sparking socket wrenches suitable for use in Explosive Atmospheres. The Non-sparking tools that compose this set are certified by a Certification Body, stating that the materials from which they are made are suitable for use in potentially explosive atmospheres, in zones 1 and/or 21 of all explosion groups (I, IIA, IIB and IIC).