ALL WHEELS EQUIP WITH 2 BALL BEARINGS -Bearings provides a very quite and smooth glide as the door opens and closes,be aware of other no bearing barn door stoppers with poor functionality which may hurt your door.Dual rollers adjustable to fit to a thinner doorboard COMPLETELY CLEAN FLUSH TO GROUND AND UPGRADED ROUND CORNERS:Countersunk screws design to make our floor guide sit flat to floor,no gap between bracket and floor, ensure no damage to your floor.Upgraded round corner shape to avoid tripping hazard, keep childrens and toes safe from the hurts. HEAVY DUTY CONSTRUCTION -Black Powder Coated finish: Our premium black powder coated bracket is made from pristine steel and perfectly shaped to offer a flush fit with your wall and floor. The SmartSmith Groove system and low profile hardware sits invisibly inside the unit which means there is no gap between bracket and floor. Our competitors haven't gone to these lengths resulting in a messy unappealing look with poor functionality.This is amplified in highly viewed areas such as living rooms WHY OUR BEARING DOOR GUIDES STAND OUT? Our premium black powder coantial component to a proper sliding door installation.However,if you buy a cheap door guide, every time you slide your door open, you will either alert your dog or wake somebody up.So, if you are really need a working door guide that's quality made, ball bearing wheels are smooth, and quiet,the barn door guide by SmartSmith is the solution you've been looking for! 2 MINUTES TO UPGRADE, ITS SUPER EASY TO INSTALL! The whole system will take you less than 10 mins to install.The directions are easy to follow and even if youre not very handy you still wont have no problem,All in all, this is a great quality hardware set at a great price and very easy to assemble.