Solid wood flooring screw - SPAXApplication. For solid wooden floorboards as well as wall and ceiling profiles with tongue and groove. Advantages. screwing in without pre-drilling (wood-dependent) directly into the torque; No further clips or clamps required. spax-solid-wood-flooring-screw ... Application. spax-solid-wood-flooring-screw Screw in at a diagonal angle into the tongue at approx. 45°. spax-solid-wood-flooring-screw The next floorboard can be inserted following the screwing process.