Compatible with standard cribs and leg shapes; includes adaptors for cribs with holes for casters
Stable and slip-resistant
Activates only when you push it (each foot has a gentle spring inside that allows it to rock from side to side)
Supports crib frames weighing up to 100 lbs. (not including mattress or baby)
Installs easily without tools
Bottom of crib legs should measure at least 1" diameter or 1" square