The SB-33 is a small Italian minimum metal blast type anti-personnel mine formerly manufactured by Misar, that entered service in 1977. The SB-33 can be emplaced by hand or scattered using the helicopter mounted SY-AT system. The body of the mine is made of two glass reinforced polycarbonate halves, with the top surface having a central neoprene pressure pad. The body has an irregular shape to make the mine harder to distinguish on the ground.