Enamel pins for backpacks can now be securely fastened with our locking pin keepers. These pin backs are designed to provide a tight grip, ensuring that your pins remain in place even during vigorous activities. The included wrench makes it easy to lock and unlock the pin backs, allowing for quick and simple adjustments. Whether you're a collector or just want to add some flair to your bag, our locking pin backs are the ideal solution. Features -Color:Silver -Material:Stainless steel -Size:4.60X1.60X0.20cm/1.81X0.63X0.08in -Size:0.90X0.60X0.60cm/0.35X0.24X0.24in -Efficient operation: the enamel pin locking backs with wrench simplify the process of securing pins, saving time and effort in various tasks. -Wide compatibility: these pin backs are compatible with a range of metal fittings and clutch interfaces, making them suitable for diverse applications. -sturdy construction: crafted from practical stainless steel, these pin backs are built to withstand wear and tear, ensuring longterm use -Reliable locking mechanism: the secure pin keepers design ensures a tight screws, preventing accidental loosening or detachment -Easy to carry: the small and lightweight design allows for easy portability, making it convenient for use in different settings, including home and automotive repairs Package list: 20 x locking pins 20 x pin backs 2 x wrenches