Lock cylinder with dimensions 30-40mm. The total length of the lock cylinder consists of two dimensions. The first starts from one edge to the center of the cylinder, where the screw is placed, while the second concerns the distance from the center to the other edge of the cylinder. Usually, the hole for the screw is not exactly in the middle of the cylinder, and the part with the smaller dimension is placed on the outside of the door. In this case, the total length of the cylinder is 70mm, with the part from the screw hole to the outside of the door being 30mm and the part from the hole to the inside of the door being 40mm.