The PT-Mi-K metallic antitank mine has an open pressure plate fashioned like a spoked wheel which is held in place by shear pins inserted through the collar on the case. The specially designed pressure plate and shear pin supports provide partial resistance to detonation by over-pressure from a nuclear explosion. The PT-Mi-K employs either Ro-5 or Ro-9 fuzes.
Height: 97mm Diameter: 300mm Weight: 7.8kilo including 4,9kilo TNT. Operating force: 200 to 450kilo. A boobytap fuze-well is provided in the base.