■Beryllium Copper & Aluminum Bronze
■The concentration of force is either to a point, or to an edge perpendicular to the length of the tool. This allows pincers to be brought close to a surface, as is often required when working with nails.
The tools used in explosion-hazardous places must be made of special materials that do not produce frictional sparks, impact sparks, or even hot, high-temperature surfaces. Such tools are called explosion-proof tools.
Explosion wrenches, explosion screwdrivers, and vices are often used together, causing "slip" problems. In order to prevent this problem, the blade of the screwdriver should be selected correctly, and the vise should ensure proper tightness.