DIY Supplies: Woodworking Origin: Mainland China Certification: NONE 1. The locking screw secures the screw in the threaded hole to prevent loosening under vibration. 2. Due to its elasticity, it ensures more uniform thread load distribution, corrects pitch and thread alignment deviations, absorbs vibration, and enhances thread joint strength and fatigue resistance. 3. Prevents cross-threading and false engagement, providing reliable performance, ideal for high-safety applications requiring durable connections. 4. High strength, high hardness, and durable. 5. Suitable for use in various low-strength materials to improve wear resistance of screw joints and prevent thread damage. Material: Stainless Steel Dimensions: Inner diameter x pitch x length, 2D = 2 x inner diameter Example: M8 (8mm screw diameter) * 1.25 (pitch of 1.25mm after installation) * 2D (installed length: 8 * 2 = 16mm) Package Includes: 20 Pcs Note: The installed length of the wire screw sleeve (effective screw hole depth) = inner diameter * 2 Satisfaction Guarantee Our priority is to provide a clear, honest, and complete representation of our products. We aim to deliver a smooth and worry-free shopping experience. If you have any questions or concerns, we are ready to assist. If you are not satisfied with your purchase, please before leaving feedback. We will do our best to resolve any issues. Refund Policy We accept returns if the product is not as described, damaged, lost, or incorrectly shipped due to our error. For damage claims, photo documentation is required. Refund options include a full refund or replacement. Partial refunds may be offered for minor issues. Service Orders are processed within 12 hours of payment confirmation.