A Scalpel Double Handle No. 3 + No.4 is a surgical instrument designed for versatility and precision in various procedures. It combines the features of both a No. 3 and a No. 4 handle, offering a single tool for a range of blade sizes. The No. 3 handle is typically used with smaller blades (e.g., No. 10, 11, 12, 15) for delicate procedures, while the No. 4 handle accommodates larger blades (e.g., No. 20, 21, 22, 23, 24, 25) for more substantial incisions.