This xzn spline drill socket set is forged from Cr-Mo alloy steel, featuring pressure resistance for impact use and wear resistance, and is suitable for all pneumatic and battery-powered impact tools. Set contents: M5, M6, M8, M10, M12, M14, M16, M18, 1/2 inch drive. This triple square drill socket set adopts paint and black oxide surface treatment, which provides maximum corrosion resistance. The size markings are laser-etched for easy and quick identification. The pin hole at the bottom of each socket is used together with the locking pin for safe connection to the driving tool. ‌This xzn spline drill socket set is forged from Cr-Mo alloy steel, featuring pressure resistance for impact use and wear resistance, and is suitable for all pneumatic and battery-powered impact tools.Set contents: M5, M6, M8, M10, M12, M14, M16, M18, 1/2 inch drive.This triple square drill socket set adopts paint and black oxide surface treatment, which provides maximum corrosion resistance. The size markings are laser-etched for easy and quick identification.The pin hole at the bottom of each socket is used together with the locking pin for safe connection to the driving tool. This xzn spline drill socket set is forged from Cr-Mo alloy steel, featuring pressure resistance for impact use and wear resistance, and is suitable for all pneumatic and battery-powered impact tools. Set contents: M5, M6, M8, M10, M12, M14, M16, M18, 1/2 inch drive. This triple square drill socket set adopts paint and black oxide surface treatment, which provides maximum corrosion resistance. The size markings are laser-etched for easy and quick identification. The pin hole at the bottom of each socket is used together with the locking pin for safe connection to the driving tool.