Surface mount, no mortising required. Four-way adjustability for smooth operation. And we will work with you to resolve it to your satisfaction.The item "36-in Bifold/Folding Closet Door Hardware Kit Track 36 Long, Easy Installation" is in sale since Wednesday, October 24, 2018. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Doors & Door Hardware\Other Door Hardware". The seller is "pi4peak" and is located in Yorktown, VA. This item can be shipped worldwide.