Product Description Simpson Cedar and Redwood siding nails are ideal for siding and fences. The checker pattern heads blend in with wood grain and reduce sunlight glare. Annular ring shank increases pull-out resistence to prevent nails from popping over time. The Diamond point for easier driving. From the Manufacturer Simpson Cedar and Redwood siding nails are ideal for siding and fences. The checker pattern heads blend in with wood grain and reduce sunlight glare. Annular ring shank increases pull-out resistence to prevent nails from popping over time. The Diamond point for easier driving.