General description Adjustable floor guide designed for wooden sliding doors, featuring a practical and innovative design that ensures smooth and quiet operation. Technical specifications Material: Durable carbon steel housing and nylon roller Wheel diameter: 37mm Suitable door thickness: 2.5cm - 5cm Installation No groove required for the door No holes drilled in the floor Usage The invisible rotary wheel on one vertical side enhances the sliding experience by making it smoother and quieter while saving space.