Special features:PROFTEC garden wood screws are made of RVS-410, a special type of stainless steel without nickel, which allows the screws to be post-hardened.This gives the screws the same strength properties as hardened steel, preventing breakage during insertion.The lens head provides a neat finish in the wood.To prevent the wood from splitting, the screw is equipped with a cutting tip. This type of drill point removes residual material from the screw hole during insertion.These garden wood screws are highly suitable for mounting Swedish rebate, shiplap boards, and other garden planks.Technical specifications:Diameter {mm}: 4Length {mm}: 50Thread length {mm}: 30Thread type: Partial threadHead model: Lens headDrive: TX-20Drive type: TXDrive size: 20Milling ribs: ExternalDrill point type: Cutting tip type-17Head diameter {mm}: 7Wobble: YesMaterial: RVS 410Lubricant: Gleitmo