Face it. Until now, drum design has not changed much since CIPP’s introduction. Our patent-pending QuickLok door system not only improves lock-down reliability but saves you time – a precious commodity on any lining job. Instead of multiple bolt-downs, you just press a simple lever. You get a secure, positive latch every single time. And no other system gives you such a clear, visual confirmation that the door is secure. QuickLok inversion drums give you extra minutes when every second counts.