Features: Accuracy engineered replacement lock clasp and screwdriver tool designed exclusively for QC35, QC35 II, QC45, and headphones ensures perfect fitment and effortless installation without additional adapters. Crafted with ABS and metal construction, the anti slip textured clasp prevents accidental drops while the ergonomic screwdriver securely fits headphone screws, offering durability and scratch easy maintenance. Ideal for enthusiasts, frequent travelers, and users seeking stable accessories to maintain or upgrade their premium headphones with professional tools. Perfect for daily commutes, gym event , or workspaces environments where secure headphone fit and quick part replacement are essential for uninterrupted sound experiences. general compatibility across multiple models makes this 2 in 1 a practical for long term headphone care, combining safety enhanced design with user friendly functionality. Specifications: Component : abs+metal Size: about 15x23mm/0.59x0.9inch Package Includes: 2xLock 1xScrewdriver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.