Floor locks keep carts, mobile racks, or other wheeled equipment stationary. They are an alternative to caster-mounted brakes. The locks are typically mounted between two swivel casters on carts with a single pair of swivel casters, or they are mounted on diagonal corners on carts with four swivel casters. The locks have a foot pedal that users step on to engage a spring-loaded brake pad that presses against the floor to create friction and prevent the caster wheels from moving. The extended height of the lock should exceed the mounting height of the casters it will be used with by 1/16" to 1/4".