60pcs Professional Pin Keepers Safe Locks Portable Locking Backs with Wrench Tools Great for DIY Jewelry Making Supplies(9x6mm)

Material: alloyNote:1. There may be slight size deviations due to manual measurement, different measuring methods and tools.2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor.

• Tool-Locking Safety Lock: The Dedicated Locking Wrench And Set Screw Design Firmly Clamp The Back Onto The Pin Post, Ensuring A More Reliable Clasp Than Standard Push-Button Clasps, Which Are Prone To Loosening Due To Movement
• Reliable Clamping: The Screw-Driven Mechanism Provides Stable Clamping Force, Securely Holding Badges To Jackets, Backpacks, And Lanyards, Preventing The Loss Of Valuable Badges During Everyday Activities
• Polished Copper Material: Made Of Smooth Copper-Plated Material With A Burr-Free Surface, Effectively Preventing Rust And Discoloration. The Rounded Design Allows It To Smoothly Conform To Clothing Without Pulling Threads Or Scratching Delicate Fabrics
• Precision Threads And Compact Wrench: The Pre-Cut Internal Threads Engage Perfectly With The Set Screw, And Can Be Easily Tightened Using The Included Allen Wrench. The Slim Wrench Provides Ample Leverage To Ensure A Tight Fit And Prevent Stripping
• Wide Compatibility: Ideal For Attaching Badges, Name Tags, Trade Badges, And Decorative Brooches, Suitable For Hats And Uniforms. Vests And Display Panels Provide Reliable Protection Whether Worn During Events Or Stored In Collections