100 Pieces Netzerkoz 3.5x35 Chipboard Screw All products in the package and are guaranteed. Din 7505 Chipboard Screw is used for comfortable and undamaged assembly in many kinds of materials such as MDF, soft and hard wood types. Thanks to its deep thread structure and pointed tip, it can be applied to the material without any pre-drilling process. Screws are star countersunk head. Produced in international quality standards. Screws are coated with zinc to increase durability. DIN 7505 norm. The dimensions of the products are defined as DiameterXLength in mm. The first dimension refers to the diameter of the product and the second dimension refers to the length.