[What is the quality of the toilet paper holder?]-This black toilet paper holder is made of high-quality Stainless Steel,rust-proof in damp conditions.In addition,we use an easy-to-clean coating,It is easy to care and clean,just wipe it with a dry towel or sponge for cleaning.This make your bathroom decoration new. [How to install this toilet paper holder?]-The integrated design of this toilet paper holder makes you have no worries of needing to position it before installation, while there are two installation options, one is no-punch installation, suitable for glass, tiles and such smooth scenes, and the other one is perforated installation, suitable for any scene, fix the product firmly . [How to change the roll paper?]-This toilet paper holder allows you to change the roll by lifting the right end of the lever. Also, the double column pivot prevents the paper roll from falling out during use. [What size paper roll does it fit?]-The toilet paper roll holder can be used with rolls up to 5.9inch in diameter and is suitable for most rolls on the market.