Set of 2 Pieces: Scalpel Handle #3 + #4 Hobby Knife Handle Suitable for 10 Series and 20 Series Scalpel Blades. High Durability: stainless steel is known for its resistance to bending, warping, and breaking. This ensures the handle can withstand the pressure of delicate surgical procedures. Corrosion Resistance & Ease of Cleaning and Sterilization: stainless steel is less likely to rust or corrode than other types of steel, making it ideal for a sterile surgical environment. The smooth, non-porous surface of stainless steel makes it easy to clean and disinfect, reducing the risk of infection. **Measuring Scale: The scale is engraved on one side of the handle, allowing for quick and precise measurements in centimeters or millimeters. The length of the scale ranges from 0 to 6 cm. Compatibility: Universal design, compatible with a variety of scalpel blades (sold separately) to accommodate different surgical tasks. Design: Incorporates a **plastic ergonomic handle design, offering a more comfortable and natural grip for the surgeon's hand, reducing fatigue during extended procedures. **Features Vary: i.e., Plastic Handle, Measuring Scale, Round Handle, and Long Handle.