This M8 x 40mm screw assembly combines a star drive head, a wing screw design, and a clamp knob handle in a black finish to deliver fast, tool adjustments and secure clamping in a compact form. Designed for everyday mounting and fixture work, it supports quick changes without the need for tools while maintaining reliable grip. Key benefits Handtightened operation: wing screw plus clamp knob handle enables quick, tool adjustments. Secure star drive: star head provides positive engagement and consistent torque. Compact and versatile: 8 mm thread size and 40 mm length fit standard components and fixtures. Consistent appearance: black finish offers a uniform look in assemblies. Easy to reuse: simple to loosen and retighten for repeated setups. Key attributes Thread size: M8 Length: 40 mm Head type: star head Drive type: star drive Style: wing screw with clamp knob handle Finish: black Material: not specified Compatibility Suitable for standard M8 threaded holes and fittings. Works with fixtures and jigs that require quick adjustments. Use cases On a workbench for mounting and securing clamps, stops, or accessories, allowing fast adjustments during setup. In woodworking or metalworking jigs where repeatable clamping positions are needed and quick readjustment is beneficial. As mounting hardware for machine frames or equipment where handson, tool tightening is preferred.