Pin locks for enamel pins are an essential accessory for anyone who wants to keep their pins secure. Our locking pin backs for jewelry making are designed to provide a strong hold, preventing pins from falling off or getting lost. The metal pin backs are practical and easy to use, with the included wrench making it simple to tighten and loosen the clasps. Whether you're a professional jeweler or a hobbyist, our locking pin backs are a reliable choice. Features -Color:Silver -Material:Stainless steel -Size:4.60X1.60X0.20cm/1.81X0.63X0.08in -Size:0.90X0.60X0.60cm/0.35X0.24X0.24in -Effortless use: the locking pin backs with wrench are designed for easy operation, allowing for quick tightening or loosening of screws without hassle. -Broad compatibility: these pin backs are suitable for a wide range of metal fittings and clutch interfaces, making them versatile for various uses. - durability: made from sturdy stainless steel, these pin backs are resistant to wear and tear, ensuring they last for a long time -Secure and reliable: the locking mechanism ensures that screws are securely fastened, preventing them from becoming loose or falling out -Convenient portability: the small and lightweight design makes these pin backs easy to carry and use in different environments, from home repairs to automotive maintenance Package list: 20 x locking pins 20 x pin backs 2 x wrenches