SKG (Foundation for Quality Gevelbouw) is an independent body that tests hinges and locks for strength, durability and burglar resistance. Burglar-resistant hinges and locks can claim the SKG quality mark for cylinders. A cylinder lock with this quality mark is a good choice. These SKG quality mark cylinders are widely available atdeur-cilinderslots.nl:
The SKG quality mark for cylinders shows whether hinges and locks comply with the Dutch Standard (NEN5089). The quality of SKG quality mark cylinders is monitored by means of random samples. The quality mark must always be visible and indelible on the outside of the hinges and locks. The degree of burglary resistance is classified with one, two or three stars, whereby the more stars the safer.
non-independently burglar-resistant. In other words: this cylinder must be used in combination with an equivalent or stronger SKG product to guarantee 3 to 5 minutes of burglary resistance.
Independently burglar-resistant for 3 minutes
Independently burglar-resistant for 5 minutes
SKG quality mark cylinders are a good choice. Do you choose cylinder locks without a quality mark? That doesn't mean your door or window isn't safe. With additional measures you can significantly increase burglar resistance. However, if you want to qualify for the Police Quality Mark for Safe Living , the quality mark is a requirement.
