Hordion 4Pcs Guitar Neck Mounting Screws Ferrules Bushings Bolts for Electric Acoustic Guitar Bass, Black Features: Neck mounting screws the main function of this product is to connect the body and neck with screws. Made of high quality and durable metal material, solid and durable. Retain the string to reduce the string friction,and keep more accurate tuning. Note: There might be 0-3mm or 0-3g error in the manual measurement, please take it into consideration, thank you! Specifications: Ferrule Size: 0.47" x 0.15" / 12 x 4mm (Dia x Thickess) Screw Length: 1.65" / 42mm Material: Metal Package Include: 4 x Guitar Neck Mounting Screws Customer Service: We take every customer seriously and do our best to provide each customer with a safer, more convenient and more satisfying shopping experience. If you have any questions about the product, we will provide you with a satisfactory solution as soon as possible.