- Standard built-in keystone eliminator- Heavy-duty casing withstands daily usage- Rugged construction withstands the rigors of daily usage- Adjustable locking ring provides ease for various height settings- Complimentary 4-side black masking borders- MaxWhite 1.1 Gain screen material is durable for every day applications and easy to clean- 160 degree wide viewing angle for multi-purpose applications- Available in black or white metal casings (most models)- Optional fabric carrying case available