Features: Made from Carbon steel, high hardness, rustproof, which is sturdy and durable. Durable and rust proof. Fine thread make the operation smoother. Indexing plunger with spring, smooth rotations, solid and durable, long service life. Achieve precise indexing and positioning with our Knob Plunger. Perfect for DIY enthusiasts and professionals alike. Suitable for carpenters, mechanics, and engineers. Take control of your projects with this versatile tool. Specifications: Material: Carbon steel Thread diameter: 6mm (0.24inch)/8mm (0.31inch)/10mm (0.39inch)/12mm (0.47inch) 6mm length: Approx. 30.5mm/1.20inch 8mm length: Approx. 40mm/1.57inch 10mm length: Approx. 49mm/1.93inch 12mm length: Approx. 59mm/2.32inch Package Includes: 1x Spring Return Knob Plunger note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.