Ezebreak's Micro-Blaster Systems allow users to break rock and concrete in almost any location. Using patented cartridge technology to break material from the inside Micro-Blasters are the most portable and energy efficient demolitions systems available. Classified as a 1.4s explosive, and exempted from Federal blasting regulations (MA requires state license), users are not required to have special licenses to safely use our systems. Requiring onlly a 5/16" (8mm) diameter hole 10" to 16" deep, expensive drilling equipment is not required. Used by excavators, building contractors, and rescue personnel to remove materials in almost any environment including interior and confined spsces. For more information including video of our products in action go to: http://www.ezebreak.com/