This spring knob plunger is a durable and practical component, expertly crafted from high-quality stainless steel, ensuring excellent corrosion resistance and a long service life. Its retractable design makes it a versatile accessory suitable for a wide range of applications, including molds, chassis, cabinets, industrial equipment, electrical appliances, and automotive systems. The ball plunger screw spring knob rotates smoothly and features a polished surface, making it a practical and user-friendly mechanical industry accessory. Lightweight and small in size, this non-lock-out indexing plunger is convenient to carry and an important part of various machines. Crafted from high-quality stainless steel for excellent corrosion resistance. Retractable design for versatile applications. Ball plunger screw spring knob rotates smoothly. Polished surface for practical mechanical industry use. Lightweight and small in size for convenience.