Superior FORGED replacement cutters
HOW TO REPLACE :
hold down the head release button on the side of the device and remove the shaver head. Firmly grasp the cutter from both ends and pull away from the device until the cutter detaches from the socket. Line up the new cutter with the socket and push down until it snaps into place. Snap the shaver head back on the device, starting on the left side , and then push down until it clicks.