Explosion proof hand chain blocks are designed to be used in potentially explosive areas and are often referred to as spark proof or anti-sparking or explosion proof hand chain hoists.

Beryllium copper also known as beryllium bronze is a copper alloy with 0.5-3% beryllium.Beryllium copper combines high strength with non-magnetic and non-sparking quality.It has excellent metal working,forming and mechining properties.It has many specialized applications in tools for hazardous environment