A scalpel is a small and think knife-like tool used in surgeries. Its purpose is to cut tissues. The scalpels are usually made as thin as possible to minimize the thickness of cut. The ones used for the eyes are a lot thinner than the ones used for the skin in other parts of the body.
The scalpels vary in length, too. They could be about 7 centimeters long but there are some that are the same length as the thumb.
Most scalpels are made with plastic handles. They vary in color. Normally, a handle is made in such a way that it can be used with other blades.
The blades are made from different materials but most manufacturers use stainless steel. It is the best choice as it is strong and rust-free. The blades are usually disposable. One can just buy another blade to be inserted to the old handle. There are also packages composed of one handle and several steel blades.On the other hand, there are blades that can be re-sharpened to be used again. However, most people have troubles sharpening the blades because they are ultimately thin. Damaged blades can develop cracks or burrs. When this happens, it is highly recommended that the blade be thrown away as they may catch microorganisms that can cause infection to the skin to be sliced.
One can buy a scalpel online. However, note that there are some shops that sell only to physicians and surgeons. Some would also sell to students of medicine, biology and other related courses.