Description: - Roller String Tree String Retainer Mounting Tree for Electric Guitars - Suit for Electric Guitars - and high quality - Material: Iron - Color: BlackSize Chart:Size: Approx x 3mm/ 0.39 x 0.11inchPackage Includes:4 Pieces String Retainer4 Pieces ScrewsNote:Due to the manual measurement, please allow 1-2cm differences .Due screen difference, the item' may be slightly different from the pictures.