Netzerkoz 50 Pieces 5x60 Yhb Chipboard Screw and 50 Pieces !0mm Yellow Rocket Dowel. Full Package Chipboard Screw Set Consisting of the most necessary products for home or workplace use. All products in the package and guaranteed. Din 7505 Chipboard Screw is used for comfortable and undamaged assembly in many types 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. Screws are coated with zinc to increase durability. DIN 7505 norm.