Stainless steel trade selection pack. High quality stainless steel fastener selection box with 535 pieces. A2 standard SS (304 Grade). General use with a huge number of applications typically including architecture, vehicles, bicycles, general outdoor equipment, repairs, commercial and domestic construction. SS fasteners are strong, look good with a clean finish and are resistant to corrosion. Hexagon Head Setcrews sizes M6 x 20 (25pcs), M6 x25 (25pcs), M6 x 30 (25pcs), M6 x 40 (25pcs), M6 x 50 (10pcs), M6 Form A Washers (100pcs), M6 x 25 Penny Washers (25pcs), M6 x 30 Penny Washers (25pcs), M6 Split Washer (50pcs), M6 Shakeproof Washer (50pcs), M6 Full Nuts (100pcs), M6 Nyloc Nuts (50pcs) and M6 Dome Nuts (25 pcs.) Comes in a sturdy strong storage box with removable partitions.