A slot gripper for removing twistlocks from container fittings or for inserting twistlocks into container fittings, comprising a twistlock receptacle, arranged in a receptacle plate and a tool that locks and unlocks twistlocks arranged in the twistlock receptacle by rotating, is characterized by two clamping jaws extending in the receptacle parallel to the receptacle plate and arranged opposite each other. A first pin extends from the receptacle plate at a right angle at the edge of the receptacle, a second pin is arranged on side of the first pin opposite the receptacle and extends from the receptacle plate at a right angle, and a rope guiding element extends from the receptacle plate at a right angle at the edge of the receptacle. The first pin, the second pin, and the rope guiding element are each supported against the force of a spring and can be lowered in the receptacle plate.