Build solid and dependable timber structures with these Spax chipboard screws. Featuring a length of 300 mm and a partial thread design, they draw heavy structural timbers, roof rafters, and framing members tightly together without gaps. The t-star Plus T30 drive ensures a secure bit fit, preventing slipping and cam-out under high torque. The countersunk multi head neatly countersinks into the wood for a smooth, flush finish that preserves the timber surface. In addition, the durable Wirox coating provides high corrosion protection for both indoor and sheltered outdoor applications. Supplied in a pack of 100 pieces, you have the right fasteners ready to tackle your woodworking projects with confidence.