US Patent 7434319 Circular cutter

A circular cutter comprises a circular blade mounted to a front end of a handle via a shaft assembly, in the handle is disposed a slide member for controlling a hood having a T-shaped hole, the T-shaped hole is located correspondingly to a center of the circular blade and arranged outside of the shaft assembly, when the hood draws back under the control of the slide member, a surface of an object to be cut will press against the hood, so as to make the shaft assembly deviate left or right freely within the T-shaped hole, and therefore, both a left hand user and a right hand user can use the same circular cutter.