This telescopic knurling head knob plunger is designed for precision positioning and stop indexing in industrial equipment. Available in sizes M6, M8, M10, M12, and M16, it offers versatile compatibility with standard machine setups. Made from durable stainless steel, the plunger features a knurled head for secure grip and a pull ring that rotates 360 degrees for easy manual expansion and contraction. Ideal for metalworking, jigs, fixtures, and other mechanical applications where reliable positioning is required.