Zuanjia ZR-10 Chrome Guitar Capo for Acoustic and Electric Guitar - Built of Zinc Alloy Metal - Make Quick Change with One Hand - Lifetime Warranty silver 1.Simplicity but perfect embodiment,Lifetime Warranty 2.High density alloy materials forging, hard to be out of shape and excellent performance 3.Internal memory steel spring and precise effective number of turns to protect even by force, automatically restored after using 4. High quality transparent silicone pad match up the pressure ratio through memory spring to eliminate 5.Concise streamline design, comfortable and convenient