This Magnet 4-Lock set from KidCo is the only magnet-lock that installs without drilling or tools. The magnets in this 4-pc. set are strong enough to penetrate 1 of solid wood; they also have a disengage feature to hold the lock open when they aren"t needed. The set comes with super-strong adhesive mounts; it also come with screws should you prefer that type of installation. This set includes 4 locks only; the key is sold separately.