Hand Screw M4 M5 M6 M8 T-Screw Rubber Head Handle Thumb Screw. Customizable Color: Black color is available and can be customized to other colors upon request. Customizable Size: Sizes are fully customizable to meet specific project requirements. Durable Materials: Made from PP, ABS, PA plastic heads with Iron plated white zinc or SUS304 metal cores. Tool-Free Operation: Hand-tightening design allows for convenient and quick installation without tools. OEM/ODM Support: Full customization, minor customization, and flexible customization services available. Quality Assurance: 100% inspection including visual and function checks before packing. Fast Delivery: Estimated delivery time is 7 days for standard orders. Versatile Application: Suitable for metric and imperial systems with various thread lengths and sizes.