Great fixing for woodworking attachment of counter-battens and wood based panels such as suction proof fastening of roof battens. For application, the non threaded part must completely reach through the upper component. The washer head then pulls the upper component tighter to the lower component with each thread rotation. Advantages of a washer head compared to a countersunk head include better tightening of connections even for warped board. The washer head guarantees double the amount of power delivery. Special properties include a wide overlying washer head. WIROX P3J provides a surface with extremely high protection against corrosion. The SPAX 4CUT cutter for screw lengths of 160 mm and larger significantly reduces the screwing in torque. Partial thread ensures firm tightening of the upper wood layer. SPAX T STAR plus offers secure bit grip, no cam out effect, and optimal force transmission. Features and benefits include considerably reduced screwing in torque and reduced splitting effect. There is length specification and manufacturer logo on the head. These screws offer higher head traction forces than countersunk head screws. The SPAX 4CUT point allows screwing in without pre drilling depending on the wood, and reduces splitting as the square end displaces the fibres. SPAX ground serrations up to the point ensure quick and secure fastening. Specifications for this product are 8mm diameter, 100mm length, and a quantity of 50.