Straight edge razor, also known as a barber razor or cut-throat razor. It consists of a handle, often made of stainless steel, and a sharp blade that folds into the handle for storage. The razor in the image has "T.D.T. STAINLESS" printed on the handle. It is shown partially encased in a clear plastic sleeve, likely for hygiene and safety purposes.
Straight razors are traditionally used for shaving facial hair and shaping hairlines, offering a close and precise shave. They require skill and care to use safely and are often associated with professional barbering. Some models, like the one pictured, use replaceable blades for convenience and hygiene. The plastic sleeve helps maintain the cleanliness of the blade when not in use.