Material: Crafted from high-quality brass, ensuring and reliability for winding various timepieces. Versatile Fit: Features a universal 5-prong design, compatible with a wide range of mechanical watches, grandfather clocks. Essential Tool: Perfect for watch collectors and horologists, this key is essential for maintaining the functionality of your mechanical watches and clocks. Compact and Portable: Its small size and design easy to carry and store, ideal for both professional and home use. Easy to Use: Designed for efficiency and ease of use, this clock key helps you wind your clocks without causing damage. Color: As Shown Material: Brass Package Contents: 1 x Brass Clock Winding Key Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.