A scalpel may include a blade cover having a length within the range of 3 to 9 centimeters and a blade body having a blade carrier and a blade. The blade cover may include a housing, a front lock member, a back lock member, and a safety lock member. The blade body may be fully retractable and movable within the housing. The front lock member, the back lock member, and the safety lock member may be configured to define at least three different locked positions of the blade body relative to the housing.
