The Scalpel Handle No. 3 & 4 (Double-Ended, 16 cm) is a versatile, two-in-one surgical instrument featuring a No. 3 fitment on one end and a No. 4 fitment on the opposite end. Measuring approximately 16 cm (6.3 inches), this design allows surgeons and laboratory technicians to switch rapidly between delicate, precise dissecting blades and heavier tissue-cutting blades without changing physical instruments, reducing operating table clutter.