Screw Products introduces TimberHex Log, Timber Truss & Landscape Screws for use for landscaping timber connections, log homes, trusses and other exterior or interior applications. With greater holding power and designed for faster installation, the 5/16 in. hex head screws range in size from 14- by 4-in. through 14 in. long and 17- by 5-in. through 11 in. long.