A coarse single thread screw developed specifically for fixing decking. Head: Countersunk pozi compatible. Finish: Hardened and specialist Green Treated. Designed for decking but also ideal for other exterior timber and fencing uses. Pozidrive compatible head enables higher torque levels with a reduced risk of cam out. Extremely coarse thread provides increased holding power in all types of decking timber. Specifically designed to accommodate wood’s natural tendency to expand and contract. Hardened and green treated for maximum durability in the face of the elements.