The Spring Plunger Grub Screw Set is a great way to secure and protect your work pieces. The set includes a variety of different sizes and lengths of grub screws, each with a spring-loaded plunger for increased security and stability. The grub screws feature a black oxide finish for added corrosion resistance. The set also includes an Allen key for easy installation. This set is ideal for a wide variety of applications, such as furniture, appliances, and automotive projects.