It's ba manual machine used in making interlocking bricks, interlocking bricks are made in soil mixed with lime cement and little water, after mixing you put 3 full spades of mixed soil and then compress using a handle after you open the machine and then use the handle again for pulling out the brick. The brick comes out when it hard, its then left for like two days and it will be ready to be used in construction since it doesn't need to be burn like the local brick. It's very durable because its made in very strong steel materials