Features: Upgrade your electric guitar with this reliable String Locking Nut, designed for tremolo bridge system. The 42mm size designs provides excellent stability and sound quality performances. Adopting classical designs, it has excellent tunings stability and Tremolo effect. Make of metal, durable and with good sound transmission performances. The designs of the tremolo bridge can ensure that the strings maintain accurate pitch during use, reducing the possibility of string misalignment. Specifications: Material: Metal Color: Gold/Silver/Black Length: Approx. 42mm/1.65inch Width: Approx. 15mm/5.90inch String spacing: Approx. 35.5mm/1.4inch Package Includes: 1x Lock Nut 2x Screws 1x Wrench note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.