Square base, improved 60° angle design, compared with the round base, the glue utilization rate is increased by more than 30% and the bonding is stronger Touch to unlock: Sticky window lock with strong load-bearing capacity. Comes with 2 keys to unlock, children will not be able to get them if properly secured. Child safety: Keep curious children away from windows, doors, refrigerators, etc. to avoid injuries. Simple installation: No drilling, no special skills required Wide range of applications: Perfect for doors, windows, refrigerators, etc., on a variety of dry and smooth surfaces