Blum System The German Engineered Blum System is a superior method of construction for office furniture. 1.25 inches of threads travel deep into our high density particleboard achieving a highly secure connection. The protruding head then locks securely into the integral die-cast cam. When it comes to the dealing with the rigors of Commercial use, nothing beats the German Engineering of Blum. The old school Pin & Cam system just can’t compete.