Transparent lock allows you to clearly see how the lock mechanism works, ideal for locksmith training and practice. Features a smooth working condition with no loose parts or pins, providing a professional experience. All moving parts are housed in open chambers for clear visibility of internal components. Features - Color: Transparent - Material: Metal and plastic - Size: Approx. 5 x 2.3 x 7.9 cm (2 x 0.9 x 3.1 inches) (L x W x H) - Lightweight and durable for convenient, repeated use - Smooth operation and durability for repeated practice - Clear view of internal mechanisms, simulating a real padlock - Suitable for locksmiths and beginners Packing list: 3 x Practice lock set, transparent training crystal keyed padlock for locksmith beginners