Carriage Bolt with a diameter of 30mm and a length of 30mm. It is positioned by striking the head so that the section with the square cross-section penetrates the material. Then, the screw is tightened securely and does not rotate during tightening of the screwdriver. The rounded head not only provides an aesthetically pleasing appearance, but also increases safety as the screw cannot be unscrewed from the outside, making it an ideal solution for securing a door or garage door.

• Diameter: 30mm
• Length: 30mm