A selection of popular C2 Strong-Fix Exterior screw sizes in a handy and reusable storage pack with clip-shut lid. Patented twin cut technology for rapid "pick-up" and reduces timber splitting Multi-layer coating consisting of organic top coat barrier and a zinc base layer Deep recess to prevent 'cam-out', giving a precise and positive drive control on every screw" Thread Dia. mm: N/A Length mm: N/A Thread Length mm: N/A Head Type: Double Countersunk with Ribs Recess Type: Pozi Point Type: Twin-Cut Driver Bit Size: PZ2 Finish: Exterior (Silver Organic) Material: Carbon SteelSize-600 Pieces Timco C2 Strong-Fix Exterior Multi-Purpose Premium Screws - Mixed Grab Pack in Silver