A selection of popular exterior hex head landscovering screw sizes in a handy and reusable storage pack with clip-shut lid. Hex head countersunk with a fixed washer Long lasting plating withstands up to 1,000 hours salt spray resistance in accordance to BS EN 9227:2012 Helix shank for removing debris and to improve clamping 50 deep single thread to provide a secure fixing with high pull-out resistance " Thread Dia. mm: 6.7 Length mm: N/A Thread Length mm: 52 Head Type: Hex Flange Recess Type: N/A Point Type: 25 Sharp with Single Slash Socket Size mm: 8 Finish: Exterior (Green Organic) Material: Carbon SteelSize 165pcs - 165 Pieces Timco Timber Screws - Hex - Exterior - Mixed Grab Pack - Green