... and sizes finish:nickel plated,zinc plated with or without hardend wood screw with all kinds of head and sizescoach ... Lag Screws 1.finish:nickel plated,zinc plated,2. with or without hardend3. head type: CSK(FLAT) SLOTTED ... HEX HEAD4.Packing:bulk packing or suitable quantity into color box,then to ourter carton5.Standard:GB,DIN, ... ,M16,M18,M20,M22,M24,M27,M30 wood screw with all kinds of head and sizes