These durable 1/4""-20 female threaded star knobs are designed for secure, tool-free adjustments on woodworking equipment, machinery, jigs, fixtures, and shop tools. Made from high-quality black nylon with galvanized carbon-steel threaded inserts, each knob provides a comfortable grip, dependable thread engagement, and long-lasting performance. The through-thread design allows a compatible threaded rod or bolt to pass fully through the knob and extend from the top, providing a wider adjustment range. Features Standard 1/4""-20 Female Thread Fits compatible 1/4""-20 threaded rods, bolts, studs, and machine components. Through-Thread Design Allows a bolt or threaded rod to pass completely through the knob for greater adjustment flexibility. Durable Construction High-quality nylon body with a galvanized carbon-steel insert for strength, toughness, and long service life. Comfortable Star-Shaped Grip Ergonomic design provides a secure, non-slip grip for easy tightening and loosening by hand. Tool-Free Adjustment Ideal for applications requiring frequent positioning, tightening, or removal. Specifications Product Type: Female Thread Through Star Knob Quantity: 16 Color: Black Material: Nylon and Galvanized Carbon Steel Thread Size: 1/4""-20 Thread Diameter: 1/4"" / 0.25"" / 6.35 mm Threads Per Inch: 20 TPI Thread Pitch: Approximately 0.05"" / 1.27 mm Head Diameter: 1.10"" / 28 mm Overall Height: 0.50"" / 12.7 mm Knob Shape: Six-Star Thread Style: Through Thread Common Applications Suitable for: Drill presses Lathes Featherboards Fences and guides Woodworking jigs Fixtures Mechanical equipment Instruments and apparatus Machine guards Shop tools Industrial equipment Replacement adjustment knobs Package Includes 16 × Black 1/4""-20 Female Thread Star Knob Handles