Series 1800 incorporates vibration absorbing rings in 3-position, side-assist handle and between main trigger handle and motor housing. Seven in. Model 1873-8 and 1873-6 grinders use 3 hp motors and operate at 8,500 rpm and 6,000 rpm, respectively. Nine in. Model 1893-6 and 1894-6 grinders operate at 6,000 rpm with 3 hp and 4.5 hp motors, respectively. Model 1853-5 and 1853-6 are 7 and 9 in. large-angle sanders operating at 5,000 and 6,000 rpm, respectively.