Got a weird tamperproof bolt with a spline head? This set of 1/2-inch drive spline socket bits is exactly what you need. It's a full set, brand new, designed to tackle those special 12-point spline fasteners you often find on gearboxes, machinery, or European cars. The sizes cover M10, M12, M14, M16, and M18, so you've got a good range. The brand is listed simply as '0', and there's no specific manufacturer part number or EAN, but it's a proper tool set. If you're a mechanic, DIYer, or work on equipment that uses these non-standard fasteners, having these on hand saves you from stripping bolts or being stuck. They fit on a standard 1/2-inch drive ratchet or breaker bar. A must-have for any complete toolkit when regular sockets just won't cut it. Don't get caught without the right tool for the job!