Type A Features:1. Guitar accessories: it can improve the performance of the guitar, put pressure on the strings, and make the guitar hold a longer stroke.2. Prevent damage: This accessory can also prevent the string from wearing out, thus prolonging the life of the string.3. Sturdy and Durable: This accessory is made of metal, equipped with mounting screws, easy to install and use. Description:1. This electric guitar buckle can protect the string life.2. It is made of metal and is convenient and simple to use. Specifications:Application: Electric GuitarsMaterial: IronColor: Silver, Gold (Optional)Size: 10*3mm/0.39*0.11inchPackage Included:2*String Retainer Guides2*ScrewsType B Features:1. Guitar accessories: it can improve the performance of the guitar, put pressure on the strings, and make the guitar hold a longer stroke.2. Prevent damage: This accessory can also prevent the string from wearing out, thus prolonging the life of the string.3. Sturdy and Durable: This accessory is made of metal, equipped with mounting screws, easy to install and use. Description:This electric guitar string can protect the life of the strings. It is made of metal and is convenient and simple to use. Specifications:Color: Silver, Black, Gold (Optional)Base Size: 0.43*0.23 inch/11*6mm Overall Height: 0.47 inch/12mm (Including Rollers)Roll Size: 0.4*0.2 inch/10*5mm Spread String (Center to Center): 0.27 inch/7mm Retaining Material: Alloy