Meking Heavy Duty 360 Degree Swivel Caster Locking Wheel with Brake Lock set of 3 for Photo Studio Video Light Stands Boom or Other Photo Studio Equipment Heavy-duty construction for light stand,tripod. Step on locks for security. Locking wheels give safety and security to your equipment. Set of three wheel casters to add mobility to light stands, boom stands or other photo studio equipment. The heavy duty foot activated brake lock on each wheel gives extra security and keeps equipment safe. Attaches to light stand legs 7/8 inch in width. Wheel in 2.95" diameter,easy and smooth rolling.