Zenith Treated Pine Screws are a general-purpose external screw. The Tufcote coating makes them suitable for general fixing into treated pine or soft timber where extra corrosion protection is required - for example, lattice panels, treated pine logs etc. - Designed to outperform galvanised-coated fasteners in treated pine timber - Coarse thread provides maximum grip - Ribbed head allows for efficient countersinking - Square drive offers more resistance to cam-out at higher torque