BRM AHXD375, DRIVE ARBOR, 1/2″ Shank, 3/8″ Shank Dia. , Max Brush Diameter 5″, Max Safe RPM: 10,000For chucking directly into a drill motor. 1/4″ shaft is recommend for brush diameters up to 4″ and the 3/8″ shaft is recommended for brushes up to 5″ diameter maximum.








