The Texas Pneumatic Air Scribe is lightweight and easy to operate. It is designed to write on a variety of materials such as steel, glass, plastic and wood. It can be used for deburring, trimming and removing broken studs on small applications. Comes in convenient carrying case. Equipped with flexible hose and filter with 3/8in. NPT fitting. Will write on a variety of materials. Carbide-tipped stylus for longer life. Hardened piston for longer life. Steel housing for durability. Adjustable throttle for a variety of jobs. Vibrating tip for all uses.