TruWood Sure Lock™ 1/2" Lap Siding does more than securely lock in each piece of siding. It also locks in Tru beauty. Featuring a hidden nail design that allows flexible and easy application, TruWood Sure Lock Lap Siding means no checks, cracks or surface variations and smooth, uniform paint application. It's available in Old Mill® textured surface for the look of cedar without the defects or high cost for Tru quality and Tru character that lasts.