A hand-held, mechanically-powered (e.g., spring-powered) device designed to inject medication (especially a local anaesthetic, vaccine or medication) transcutaneously into the human body. It is a manually-operated, needleless device that can have various configurations according to application. It will typically be a pistol-shaped plunger driven instrument with single or multi-pointed holed barrels through which the medication/vaccine is driven under high pressure. The delivered medication/vaccine will typically be supplied in prefilled containers. This device is not a hypodermic syringe. This is a reusable device.