Abstract: A shield has a rectangular body, a first rollerball bearing assembly mounted in a first bracket joined to the body, such that the first bracket extends away from the left vertical edge of the body, a second rollerball bearing assembly mounted in a second bracket such that the second bracket extends away from the right vertical edge of the body, and the spacing between the first and the second rollerball bearing assemblies is greater than the width of the body. The body rests on the rollerball bearing assemblies when standing and a user, is enabled to hold the shield oriented vertically and to move the shield side-to-side, and the user is further enabled to tilt the shield back toward the user, transferring support to wheels rather than the rollerball bearing assemblies, and is then enabled to move the shield forward and backward on the wheels.

Abstract: A shield has a rectangular body, one or more window openings, bullet-resistant glass panes in the windows, handles positioned along edges of the body on the backside, two or more rollerball bearings implemented along the lowermost edge of the body, and two wheels on axles with axes in the direction of the width of the body, the wheels positioned by brackets joined to the backside of the body proximate the lowermost edge. A user, grasping the handles, is enabled to hold the shield vertically oriented supported on the rollerball bearings and to move the shield side-to-side on the rollerball bearings, and wherein the user is further enabled to tilt the shield back toward the user, transferring support to the wheels rather than the rollerball bearings, and is then enabled to move the shield forward and backward on the ground or floor surface on the wheels.