Silicon bronze wood screws seriesSilicon bronze is an alloy with mostly copper and a thin amount of silicon. Silicon Bronze is used primarily in marine environments, Wooden boats and restoration. It is preferred over stainless steel in wooden boat construction and re-fastening due to its excellent corrosion resistance, and over brass due to its higher strength.Standards: ANSI, BS, DIN, JIS, etcSpecifications: Head Type: Flat head, Oval head, Round head, etc.Drive Type: Phillips, Square, Slotted, Phillips/Slotted, Pozi, etc.Diameter: #3 - #24 Length: 4-150mmFeatures: Material: Silicon bronzeSurface finish: Self colourInner packing: Polybag or as customers’ requests Outer packing: Carton or as customers’ requests