Hydraulic valve stops blades from spinning within seconds upon shutdown. Motor cover protects important components and connections from debris. Optional pressure gauge monitors blade load for ideal performance. Direct-drive bearing delivers higher efficiency and extended durability John Deere rotary cutters excel at clearing medium to heavy brush and hardwoods up to 25.4 cm (10 in.) in diameter. Fits John Deere Compact Track Loaders - 316GR, 318G, 320G, 324G, 325