Screw In Hooks ALL SIZES Stainless Steel Marine Boat Garden Shed Hook Heavy Duty. Perfect for marine, boat, garden shed, and other outdoor uses. Stainless steel is highly resistant to corrosion and rust. Bulk wholesale packs at substantial discounts (select from the dropdown menu). Made from Grade 304 stainless steel. Guaranteed no rust or corrosion. Available Hook Sizes: 55mm / 60mm / 80mm / 100mm. Gauge/Wire Diameter: 3.6mm. Internal Hook Diameter: 16.4mm. Hook Opening Diameter: 12.2mm. Shaft Length, Inc Thread: 31.6mm. Thread Length: 21.5mm. Total Length: 56.5mm. Gauge/Wire Diameter: 4.2mm. Internal Hook Diameter: 17.9mm. Hook Opening Diameter: 13.3mm. Shaft Length, Inc Thread: 34.2mm. Total Length: 60.3mm. Gauge/Wire Diameter: 4.8mm. Internal Hook Diameter: 20.4mm. Hook Opening Diameter: 15.1mm. Shaft Length, Inc Thread: 48.9mm. Thread Length: 26.5mm. Total Length: 79.7mm. Gauge/Wire Diameter: 7.2mm. Internal Hook Diameter: 24.4mm. Hook Opening Diameter: 20.6mm. Shaft Length, Inc Thread: 57.1mm. Thread Length: 45.3mm. Total Length: 100.07mm.