3M™ Star Mandrel, 944, black, 1/4 in x 20 1/4 in (6.35 mm x 514.35 mm)

Features

• "Securely attaches Scotch-Brite™ Stars to die grinder Enables die grinder to reach internal diameters of pipes, tubing Shank size is 1/4 in (0.64 cm) Thread size is 1/4-20 EXT Runs at maximum RPM of 24,100"