Hard aluminium nuts Granite in set of eleven different sizes on a steel wire. Granite are slightly curved for easier, quicker, and safer placement in different types of cracks. Certifications: CE 1015, EN 12270 Size 1 * range: 7.5 - 11 mm * weight: 17 g * strength: 6 kN Size 2 * range: 8.5 - 12.8 mm * weight: 24 g * strength: 6 kN Size 3 * range: 9.8 - 13.8 mm * weight: 25 g * strength: 9 kN Size 4 * range: 11 - 14.8 mm * weight: 26 g * strength: 9 kN Size 5 * range: 12.5 - 15.8 mm * weight: 28 g * strength: 10 kN Size 6 * range: 16 - 19.5 mm * weight: 31 g * strength: 10 kN Size 7 * range: 18.5 - 22.5 mm * weight: 33 g * strength: 10 kN Size 8 * range: 21.5 - 22.5 mm * weight: 36 g * strength: 10 kN Size 9 * range: 21.5 - 24.5 mm * weight: 41 g * strength: 12 kN Size 10 * range: 24.5 - 27.5 mm * weight: 50 g * strength: 12 kN Size 11 * range: 27.5 - 29.5 mm * weight: 57 g * strength: 12 kN Material: hard aluminium alloy, steel rope Made in Czech republic.