Durable Material: The spring indexing plunger is made of high-quality stainless steel, offering high hardness and rust resistance, ensuring sturdiness and durability. Easy to Use: To operate the indexing plunger, simply pull the handle out, rotate it 90 degrees, and release. Lock Spring Screw: The indexing plunger features a spring mechanism for smooth rotation, providing solid and durable performance with a long service life. Functionality: The self-locking knob plunger allows control over the pin's expansion and contraction through handle adjustment, enabling indexing, positioning, or stop limit functions. Fine Thread Options: Available with M10, M12, M16, or M20 threads. Specifications: - Material: Stainless Steel - Size Chart: - M10: Overall Length – 51mm (2.01 inches) - M12: Overall Length – 61mm (2.40 inches) - M16: Overall Length – 77mm (3.03 inches) - M20: Overall Length – 90mm (3.54 inches) Package Includes: 1 Indexing Plunger Note: Slight measurement deviations may occur due to manual measurement and monitor differences.