✔[Before You Buy]: Complete the pre-measure checklist and carefully review the full instructions in the Product Description below. Then, watch the available full installation video to ensure that The Solid Mount is compatible with your fiberglass shower and wood stud locations, that you have the necessary tools, and that you are prepared for the precise installation process. Doing so can also eliminate the need for a return, saving you time. [Compatibility}: The Solid Mount is designed for wood studs and most fiberglass showers. For contoured wall showers, install the grab bar vertically and apply extra caulking around the fiberglass and Solid Mount for a water-tight seal. It fits most grab bars (sold separately) with 2 1/2" or 3" round flanges from brands like Amazon Basics, American Standard, Moen, and Kohler. A visible 1/4" white ring will appear with the 2 1/2" flange. Not compatible with tile, marble, drywall, or any type of metal studs. [Design Concept]: The Solid Mount attaches to wood studs using adjustable spacers and a 5/16" x 4" (approx.) lag bolt through a 2" hole. Once installed, your grab bar (not included) is securely mounted for a water-tight fit. This system offers strong support independent of the fiberglass shower, reducing stress on the enclosure to prevent cracks and ensure safety and stability. Installation takes approximately 1 hour. Not compatible with tile, marble, drywall, or any type of metal studs. [Durable Materials]: The Solid Mount features stainless steel A2 screws, stainless steel washers, 5/16" x 4" (approx.) zinc lag bolts, and high-density proprietary plastic for lasting safety and stability. Developed through years of design and testing, our engineered Structural Plastic and hardware are thoroughly tested (contact us for documentation ). We confidently guarantee the product's quality and performance, with commercial lab testing supporting a 300+ lb capacity. (Not for shower chairs) 💡[Pro Tips]: Watch the full installation video before purchasing (See Video in product photos). The kit includes step-by-step color instructions synced with the video. Need help pre-purchase help with locating studs see our step-by-step instructions under Product Description, if you have pre-sale questions or installation questions, contact us or hire a professional for assistance. Before you Buy: Measure from the edge of where the fiberglass shower meets the drywall to the face of the fiberglass shower; if the measurement falls between 1/8" to 1-5/8", The Solid Mount should work for you. Also, take a stud finder and check above the shower wall to locate the studs, this will show you the area where the studs are located behind the shower wall and where the grab bar will go. There is also an Installation Video available. Compatibility: The Solid Mount is compatible with wood studs only and works with most fiberglass showers. For showers that have contoured walls, the grab bar needs to be installed vertically and will still need extra caulking around the fiberglass and The Solid Mount to maintain a water-tight seal. Works with most grab bars (sold separately) from brands like Amazon Basics, American Standard, Moen, and Kohler, with a 2 1/2" or 3" round flange. A visible 1/4” white ring will appear with a 2 1/2" round flange. Grab bar not included. The Solid Mount is not compatible with the following materials: Tile, Marble, Drywall (sheetrock), or Buildings that have any type of Metal Studs. The Solid Mount is not recommended for motorhomes or mobile homes due to construction constraints. Design Concept: The Solid Mount is attached using the included adjustable spacers and lag bolt directly to your home's wood studs through a 2” hole. Once installed, your grab bar (not included) is then attached to The Solid Mount and sealed for a water-tight installation. The Solid Mount offers safe, solid, and strong support independent of the fiberglass shower. This prevents stress on the fiberglass enclosure, avoiding cracks and ensuring maximum safety and stability. Installation takes about 1 hour. The Solid Mount is not compatible with the following materials: Tile, Marble, Drywall (sheetrock), or Buildings that have any type of Metal Studs. The Solid Mount is not recommended for motorhomes or mobile homes due to construction constraints.