Econo Scalpel Handle #3 is compatible with size 10 series disposable blades (10, 11, 12, 15) and used for sharp dissection. This handle has horizontal serrations for thumb and forefinger gripping. This #3 handle has centimeter and millimeter markings on the handle for measuring tissue. Econo instruments are Sklar's floor-grade, disposable instruments and are sold in bulk quantities.