10Pcs Pin Keepers Pin Safe Locks Pin Backs Clasp Locking Pin Keeper Backs Brooch Pin Locking Pin Backs With Wrench Tools Features: - Each pin keeper is approximately 5 mm in diameter and 6 mm in height. - These bulk pin backs are made of nickel-plated copper, durable and rust-resistant. - Smooth surface, sturdy design securely locks pins in place, preventing loss. - Provides reliable replacement for damaged or missing locking mechanisms. - Keeps accessories firmly attached during important occasions. - Small screw pre-installed for easy use—no loose parts to handle. How to Use: Insert the black screw into the center hole. Use the included wrench to tighten the screw halfway to secure it. Attach the pin keeper to the brooch or medal by inserting both ends into a small hole. Continue tightening the screw with the wrench until fully secured. Item Type: Pin Keepers Material: Brass Color: Silver Size: As shown in photos Quantity: 10 Sets Note: - Size measurements are manually taken and may have a variance of 0–3 mm, which is considered normal. - Due to differences in monitor displays, the actual item color may vary slightly from the image. Package Includes: 10 Sets x Pin Safe Locks