Wearsharp™ 1100 series teeth are larger than the 900 series and have an innovative design allowing them to retain a sharp cutting surface over time, unlike traditional teeth that tend to round over.  This increases the lifespan and durability of each tooth. These teeth utilize the pockets of their corresponding 1100 series.  These teeth are also three-position indexable.  Just loosen, turn and tighten for a new, sharp edge.  Wearsharp™ 1100 Series Teeth should be used with stump grinders with horsepower greater than 90.