This recessed pull has been designed to be used on sliding doors. A minimum door thickness of 44mm is required when fitting two of these products back to back. When fitting these products, they will require bonding. This product has passed an installation strength test when fitted with Evo-stick mirror adhesive. However Joseph Giles has not tested the combination of this product and these adhesives on every possible door substrate, and in every possible situation, so we would advise you run your own tests before installing this product with any adhesives, including Evo-stick mirror adhesive. Supplied as single items and available in a range of finishes.