Material: Made of high-quality zinc alloy, special steel spring and elastic silicone, high hardness, wear-resistant, anti-oxidation, well-made, sturdy and reliable, durable Size: You will receive 1 set of Shark Caps (including storage flannel bag), the size is about 11*10.8cm/4.33*4.25 inches. The right size, comfortable and lightweight to hold, easy to use Design: Unique shark exterior design, surface electroplating process, rich metallic luster, smooth and round, looks great and different; mechanical structure design, easier to hold High quality: High-quality silicone foot pads, which fit closely and protect the neck; special steel springs are fatigue-resistant, elastic memory, and can be used repeatedly for a long time Versatile: Every press is even and reliable, and the strings don't have weird sounds or "vibrations." Suitable for 6-string acoustic guitar, electric guitar, bass, ukulele, banjo, mandolin, etc., with good compatibility. A great gift for anyone who plays guitar, the best choice for a beginner or professional guitarist