Adjustable Sliding Door Rollers: Fully adjustable barn door guide, fits doors up to 75mm thick. Safety Design: Floor roller with special design, a flat bottom and rounded edges protect your toes and knees from injury. Sturdy and durable: The adjustable door guide is made from carbon steel with a black powder coat finish to ensure indoor and outdoor use. Easy to install: wall mounted with screws, and no groove is needed for the door. By adjusting the rollers in the track to fit your door panel. No need to drill holes on the floor. Size:1 pack - black Name: Adjustable floor guide. Contents: 1 steel bracket. 2 ribbed plastic anchors. 2 short screws. 2 long screw bolts. < p>1 key. Color: black. Fully adjustable for doors up to 75mm thick and easy installation. Perfect for your Door: Fully adjustable for doors up to 75mm thick and easily adjusted with the included wrench to secure most barn door sizes or types. Fully recessed to the floor. p> Special design with bottom cut slot to allow the barn door pedal to stay completely flat on the floor and the mounting wall screws will be aligned flush with the bracket to avoid popping out and scraping against the door.