10Pcs Brooch Pin Safe Keepers Pin Locks Pin Backs Clasp Locking Pin Keeper Backs Locking Pin Backs With Wrench Tools Feature These bulk pin backs are made of nickel-plated copper, durable and anti-rust. Smooth surface, sturdy and lock your pins firmly, without worrying they will fall off. Provides replacement for torn screw or locking mechanism. Keeps your objects in place during important moments. Prevents loss of pins by securing them in place with this handy set. Small screw pre-set for easy use. No additional small parts required. How to use: Insert the black screw into the middle hole. Use the included wrench to screw half of the black screw to secure it. Attach to the brooch or medal by fixing it to either end of a small hole. Use the wrench to gradually tighten the black screw to ensure a secure fit. Item Type: Pin Keepers Material: Brass Color: Silver Type: A/B (Optional) Size: A – Large 6x9mm B – Small 6x5mm For more details, please refer to the photo. Quantity: 10 Sets Note: Size measurements are taken manually and may have a 0 to 3mm variation, which is considered normal. Due to differences in monitor displays, the actual color of the item may vary slightly from the image. Package includes: 10 Sets x Pin Safe Locks