SPAX - Safety, quality and reliability since 1967. The branded product in the characteristic green packaging - produced at the home in Germany and exported from there to all the world: clever minds in Ennepetal constantly develop ideas, expand the product range and establish the highest quality for DIY enthusiasts, professional processors, planners and architects. around the world. t. - This product is suitable for use: For attaching rafters or roof insulation systems - Higher head pulling forces thanks to the flat head. Optimal power transmission and clean fit even when working overhead with Spax bit T-Star plus T40 with guide pins. Effortless working and longer battery life: no pre-drilling (depending on wood). Easy penetration, reduction of splitting effect thanks to 4CUT: four edges in the screw tip. Easier cutting of the wood fibre thanks to the Spax wave profile, made in Germany. Construction approved: European technical approval for screws as a wood connecting agent in supporting wood structures (ETA-12/0114). Box contents: 1 Spax box, 50 pieces wood construction screw, T-Star plus, flat head, partial thread, 4CUT, Verz. inkinkinkink, yellow paspasSifted, thread diameter (diameter 1) = 8 mm x total length (Ls) = 400 mm, partial thread length (LgT) = 80 mm, head diameter (diameter): 20 mm, bit not included