Upgrade your Holley carburetor with this precision-crafted idle adjustment knob. Made from billet aluminum, this 10-32 thread carburetor screw provides convenient fingertip control over your engine's idle speed. No more fumbling with screwdrivers - this knob allows for quick, easy adjustments while maintaining the perfect idle. The durable aluminum construction ensures long-lasting performance and a sleek appearance under your hood. Whether you're fine-tuning your engine's performance or making routine adjustments, this carburetor idle knob screw offers both functionality and convenience. Installation is straightforward, and the knob provides smooth operation for precise control. Perfect for automotive enthusiasts who want easier access to their carburetor's idle adjustment settings.