Product features: - Flat head carbon steel screws with black oxide finish - Includes 7 different sizes: M3.5 x 16/20/25/30/35/40/50 mm - Ideal for drywall, sheet metal, plywood, and fiberboard - Compact threads to prevent deformation during screwing - Recommended to pre-drill the wood Product specifications: - Material: carbon steel with black oxide finish - Type: flat head M3.5 - Color: black - Quantity: 260 units - Measurements: - M3.5 x 16 mm: 70 units - M3.5 x 20 mm: 50 units - M3.5 x 25 mm: 35 units - M3.5 x 30 mm: 30 units - M3.5 x 35 mm: 25 units - M3.5 x 40 mm: 20 units - M3.5 x 50 mm: 20 units - Wall plugs M6 x 30 mm: 10 units - Includes 1 storage box