Screws are available in 4, 6, 8 & 10 inch lengths. Olylog timber screw fasteners are sold by the box of 50 pieces each (the 10 incher's in 40 ct boxes). Each has a 1/4" shank diameter and 2" thread that give each fastener the ability to pull and hold logs into position. Offers fast drilling and threading with no need to pre-drill. 5-16" hex head typical on all sizes. Green Ceramic coating for protection from the elements. Great for installing Log D Trims, Vertical Log Corners and most all log applications. Click photo for more Details. Usually ships in 1-3 days.