See inside finished walls, floors, ceilings, even internal engine components (including diesel) with this ultra-thin fiber optic scope. Tip and shaft measure only 5.8mm, requiring an opening of only 1/4in. Has adjustable focus and a lamp to illuminate dark crevices (AA batteries not included). Flexible 36in. shaft with a 40° field of view. Simple one hand operation is perfect for electricians, plumbers, carpenters and mechanics. Comes in a blow molded plastic case for carrying & protection of the unit. U.S.A.