Bosch 9 in Drywall Sander Kit This drywall sander helps make sanding muds and plasters on the ceiling or wall and other surface prep get done more smoothly, easily and quickly. The Bosch GTR55-85 9 In. Drywall Sander features an exclusive Ultra-Flexible Head, which reduces the risk of damage to the surface, and it helps enable more effortless movement across ceilings and walls. The sander features two suction modes: wall-sanding mode and ceiling-suction mode. The ceiling-suction feature helps reduce the weight of the tool while working overhead. This helps to reduce strain and lessen fatigue. The T-Handle grip design provides a better and more adaptable grip to help reduce arm strain, especially overhead. The tool includes a quick-release extension pole, which allows the user to quickly adapt the length of the sander. Subtracting the extension will remove the weight of the pole versus a telescoping pole extension. The tool’s easy-to-reach power switch, rpm and airflow controls allow adjustments without removing the hand from the grip.