A Scalpel Handle No. 3 with a No. 4 body shape (often designated in surgical catalogs as a No. 3 Thicker/Heavy or No. 3 Ergonomic handle) is a specialized surgical tool designed to combine the small fitment tip of a No. 3 with the thicker, broader, and heavier grip profile of a No. 4 handle. [1, 2, 3]

This hybrid design allows surgeons, podiatrists, and lab technicians to utilize small, precise blades (like a No. 11 or No. 15) while benefiting from the superior physical leverage and reduced hand fatigue normally provided by a larger No. 4 handle.