A fully rotatable guard assembly (200) for use with a tool having a rotating disc includes at least one rotatable bearing (215, 223) for positioning on a shaft behind a rotating disc (207). A shield (203) works with the rotatable bearing (215, 223) for preventing sparks or other debris from being projected toward a user. A brake lever (241) is attached to the shield (203) for allowing the user to position the shield (203) at a predetermined position in relation to the rotating disc. The shield (203) is configured to cover approximately one-half (½) of the rotating disc (207) such that the position of the shield (203) can be easily rotated through use of the brake lever (241) for enabling the user to move the shield (203) such that the rotating disc (207) can access a workpiece.