Features Material: The metal body ensures high strength and durability for practical use. Enhanced Stability: Designed to secure guitars strings in place, improving tuning stability and overall performance. Easy Installation: Simple to install, allowing quick adjustments without the need for special tool. Functional: Relieve the guitars strings and reduce the wear of the strings to extend the life of the strings. Package: Set of 6 blocks for replacing old or damageds Tremolo bridges insert blocks. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurementSize: 8.15*5*4mm Material: Metal Package List: 6pcs String Lock Insert Blocks Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!