5 Pack Of RYOBI 1/2" x 1/4" Metal Arbor Adaptors A10DD31 5 Pack Of RYOBI 1/2" x 1/4" Metal Arbor Adaptors Designed to fit standard drills with a 4,000 RPM maximum Made from metal For connecting 1/2" arbor buffing wheels to standard drills Designed to fit 4 in. buffing wheels