Abstract: An electric scissors has a body and a changeable shear. The body has a stationary shear and an oscillating blade holder. The stationary shear has an arm and a first blade. The arm is formed on and protrudes outwardly from a front end of the body. The first blade is securely mounted on the arm. The oscillating blade holder is pivotally mounted to the front end of the body to oscillate relative to the stationary shear, and has a rail formed on the oscillating blade holder. The changeable shear has a blade seat and a second blade. The blade seat has a channel detachably and slidably engaging the rail of the oscillating blade holder. The second blade is securely mounted on the blade seat to obliquely abut the first blade. With the replaceable blade, the electric scissors can be continuously used without discarding the whole electric scissors when the blade is dull or damaged.

Abstract: A circle cutter has a hand crank, a center positioning unit and a cutter unit. The center positioning unit is mounted on one end of the hand crank and has an awl-free foot positioning a center of a circle to be cut or drawn without generating a pierced hole. The cutter unit is mounted adjustably on the hand crank and has a cutting depth adjustable assembly providing multiple cutting depths for cutting things with different thickness. Therefore, to cut or draw a circle with the circle cutter is hole-free, labor-saving and flexible.