Terrace screws are especially suitable for hardwood. You usually are able to use them without pre-drilling.
It's a common dream to relax on your terrace in summer. Everybody owning a house or property and invested hard work in some bigger projects, knows the importance of quality. For that reason many owners prefer, not only for beauty reasons, hardwood from distant counties. The advantage is the high durability of at least 25 years! That the wood is good fastened by screws high standards have to be filled. According to a recent screw testing only SPAX is able to completely fill the requirements. The swedish magazine "Den Moderna Hantverkaren" tested nine terrace screws from different manufacturers. Thereby they compared how far and easy the screws could be inserted into Cumero- and Ipe- wood. First with and then without pre-drilling. The result is obvious: "After we tested various screws, we can record, there is only one screw that is able to full-fill all requirements." Screws from other manufacturers were unable or only with difficulties able to get inserted in the wood, screws deformed or tips broke off. Only the tested SPAX terrace screw met the requirements and became "superior test winner". Only SPAX shows unexceptional clamping force in the test, even without pre-drilling and presents a very fast drilling time. Summarizing the „Den Moderna Hantverkaren“ writes: " The SPAX stainless steel terrace screw is a real efficient screw with a good drill bit. The screw drills within 2 seconds into the Cumaron wood and within 4 seconds into the Ipe wood. Independent of pre-drilling, you archive a very clean result with good clamping force between the materials. The best screw of the test."