Certifed goggles for grinders with round lenses 50 mm in diameter, 2,9 mm thick, optical class 1. Level S resistance to metal, wood or plastic particles impact - up to the speed of 45 m/s. They are very comfortable, with additional fastening on the sides which enable good positioning on the face without the possibility of sliding. They have indirect ventilation, and also serve as a protection against side impact. The goggles are made of high quality plastic with good fnish, without harsh edges which may irritate the face. The two parts of the frame are connected with a screw, which can be easily unscrewed so that lenses, which can be ordered separately, can be replaced. The length of the temples is adjustable.