The Graham Field-1293 is a high-quality diagnostic penlight constructed from durable stainless steel. It provides a focused light beam suitable for assessing pupil dilation and conducting general throat or skin examinations. The side of the penlight features a printed pupil gauge ranging from 2mm to 9mm and a 5cm ruler for immediate clinical measurements. The pocket clip functions as the integrated power switch, allowing for easy one-handed operation while preventing the light from staying on accidentally when stored.