Steel alloy construction. Allows M14 x 2 female accessories to be used on drills. Parallel-faced nut for tightening and loosening. Compatible with all power and air drills with a 10mm chuck capacity. Steel alloy construction. Allows M14 x 2 female accessories to be used on drills. Parallel-faced nut for tightening and loosening. Compatible with all power and air drills with a 10mm chuck capacity.