Tub of 1000 screws, green treated for outdoor use. Coarse, single thread screw developed specifically for fixing decking. Also ideal for other exterior timber and fencing uses. Hardened and specialist green treated finish for maximum durability in the face of the elements. Countersunk pozi head enables higher torque levels with a reduced risk of cam out. Increased holding power in all types of decking timber. Specifically designed to accommodate wood's natural tendency to expand and contract. With an extremely coarse thread for even greater holding power, you can depend on these decking screws to get the job done professionally. Designed for use with garden decking, the screws are equally suitable for fencing and other outdoor timber - they're hardened and green-treated for maximum durability in all weather. Pozi-compatible for higher torque levels and a reduced risk of cam-out, the countersunk head ensures a flush finish. The screws are also specially designed to accommodate the wood's natural tendency to expand and contract - you can be confident of a secure fix that'll last through the seasons. Perfect for use on decking, fencing and other outdoor jobs. Coarse thread increases holding power in decking timber. Hardened and green-treated for all-weather performance. PZ-compatible head - higher torque levels, reduced cam-out. Accommodates wood's natural tendency to expand and contract. Forgefix Single Thread Deck & Outdoor Pozi Screw 4.5 x 60mm (1000 Pack) in Green. Decking Screw Pozi ST Green Anti-Corrosion Treated 4.5 x 60mm Bulk 1000. These Forgefix single threaded Decking Screws have Pozi compatible heads and are specially designed, hardened and green treated. The design of the screw helps prevent splitting the boards, and allowing them to expand and contract with the changing seasons. APPLICATION: Specifically used in Decking applications but also widely used in exterior timber and fencing applications. The 1,000 hour green treated finish offers excellent corrosion resistance to ACQ (Alkaline Copper Quaternary) treated timber used in construction and decking applications. The Pozidriv screw is similar in appearance to the classic Phillips cross-head, but in fact is very different. The Pozidriv has four additional points of contact, and does not have the rounded corners that the Phillips screw drive has. The biggest advantage it offers is that, when used with the correct tooling in good condition, it does not cam out, allowing great torque to be applied. The Pozidriv screw can easily be distinguished by a line embossed in the screw head at 45 to the slots for the driver. Single thread screws have been designed to offer higher pull out values and quicker insertion.