Ergo-Lock 4.0 cupboard lock, cylinder lock, black/silver. Supplied = assembled. Lock type = cylinder lock. Product type = locks. Replaceable core cylinder - easy replacement without tools at any time. Secure three-point locking - prevents the cupboard from being pried open. Easy to operate - even when wearing gloves. The Ergo-Lock 4.0 lock family combines modern design and functional technical details to create high quality, practical and hardwearing cupboard locks. The patented mechanism means the lock only needs to be pressed closed to lock it - ideal, for example, if your hands are full or dirty.