The new key model of 4mm chain is lightweight and easy to carry. Square chain for added strength. The length of 43.3 inches (110 cm) can be worn over the shoulder. Colorful cover will not scratch your bike LENGTH: 43.3 inches (1100 mm) KEY TYPE: KEY THICKNESS: 0.2 inches (4 mm) LEVEL SYSTEM LEVEL4 WEIGHT: 18.1 oz (510 g) Product color and size information may differ from the actual product depending on your display settings. Product specifications, logo design, etc. may be subject to change for product improvement. We also cannot answer measurements or personal fit that the manufacturer does not announce. Please be aware of