With the explosion-proof structure ZM12 Electric Coal Drill can be safely used for mine where methane and coal dust explosion. Dry coal drill is a hand-held drill used in the soft coal layer and soft rock layer,with mine explosion-proof structure water injection device, can be safely used for mine where methane and coal dust explosion. This is a hand-held drill that can be used in in various mines such coal mine, marble mine, metal mine and rock layer.