Feature: 1. Made of good quality aluminium alloy, sturdy, non-deformation, features high strength, resistant to high temperature and abrasion, durable for long time use. 2. Ultralight, lighter than other material skewers, adding no burden to bike, good for reducing the weight of bike. 3. Tool-free installation, just insert the adapter into the thru axle hub. 4. Tool-free installation, just insert the adapter into the thru axle hub. 5. Nice accessory for your bike. Specification: Features: Made of good quality aluminium alloy, sturdy, non-deformation, features high strength, resistant to high temperature and abrasion, durable for long time use. Ultralight, lighter than other material skewers, adding no burden to bike, good for reducing the weight of bike. Tool-free installation, just insert the adapter into the thru axle hub. It converts 15mm thru-axle hub to standard 12mm quick release skewer. Nice accessory for your bike. Specification: Material: Aluminuim Alloy Color: Black, Silver (Optional) Outer Diameter: Approx. 15mm / 0.59inch Inner Diameter: Approx. 12mm / 0.47inch Total Length: Approx. 100mm / 3.94inch Weight: Approx. 19g Package List: 1 * Bike Quick Release Thru Axle Hub Adapter