Milwaukee® Upper Gear Case is designed for 6078 D.I. 6000 RPM dial speed sander, 6072 2.25 max hp sanders, 7" and 9" 5000 RPM sanders, 6078 2.25 hp 7" and 9" 0 - 6000 RPM sander, 6072 9" sander, 6075 D.I. 6000 RPM lightweight sanders and 6076 grinders.