HEAVY DUTY SCREW EYE HOOKS STAINLESS STEEL GRADE 304 MARINE GARDEN 20MM -150MM. Heavy-Duty Stainless Steel Construction: Made from premium grade 304 stainless steel (A2), which is known for its 18% chromium and 8% nickel composition (’18/8′). Rust-Proof and Non-Ferrous: Designed to resist corrosion, making these hooks perfect for marine and outdoor use. Non-Magnetic: Suitable for various applications without the concern of magnetism. Unwelded Eye Design: Strong and reliable, yet easy to install. Versatile Use: These hooks can be screwed directly into wood or masonry when used with a wall plug. Important Note: Measurements provided represent the total length of the hook or hoop. Available Sizes (Measurements in Millimetres). Gauge/Wire Diameter: 2.1mm. Internal Hook Diameter: 6.1mm. Shaft Length: 14.9mm. Thread Length: 8.4mm. Total Length: 25.2mm. Gauge/Wire Diameter: 3.6mm. Internal Hook Diameter: 12.3mm. Shaft Length: 19.5mm. Thread Length: 16.7mm. Total Length: 40.3mm. Gauge/Wire Diameter: 4.9mm. Internal Hook Diameter: 15.9mm. Shaft Length: 28.7mm. Thread Length: 16.6mm. Total Length: 54.8mm. Gauge/Wire Diameter: 5.1mm. Internal Hook Diameter: 20.3mm. Shaft Length: 34.2mm. Thread Length: 23.9mm. Total Length: 65.5mm. Gauge/Wire Diameter: 7.4mm. Internal Hook Diameter: 21.1mm. Shaft Length: 38.8mm. Thread Length: 29.6mm. Total Length: 74.7mm. Gauge/Wire Diameter: 7.3mm. Internal Hook Diameter: 21.4mm. Shaft Length: 62.3mm. Thread Length: 44.8mm. Total Length: 99.6mm. Perfect for use in marine, garden, and construction projects where durability and resistance to the elements are crucial.