- Package contents: 1 clamping knob - Thread specification: M12x40mm - Handle diameter: 50 mm - Durable material: Bakelite knob with good toughness and impact resistance for robustness. Screw surface zinc plated to prevent rust. - Easy to use: Comfortable grip with a fully threaded screw design for easy installation, disassembly, and adjustment. - Smooth surface: Star head button has a smooth grip, offering practical, safe, and reliable handling with good tightness. - Key benefits: sturdy and long-lasting construction; corrosion resistance from zinc plating; reliable clamping and straightforward adjustments; compatible with standard M12 threaded applications. - Applications: - Clamping workpieces on milling machines or drill presses for secure, quick setup - Securing and adjusting jigs and fixtures in woodworking or metalworking - Mounting and fine-tuning fixtures on tool benches, workstations, or lab setups