[STURDY STEEL BRACKET, IMPROVED ROUNDED CORNERS] - The black powder-coated bottom roller track for barn doors is sturdy, durable, and rust-proof, flush with the floor, no screws protruding from the bottom, no door groove required, no drilling into the floor. With rounded corners, countersunk holes, and recessed screw heads, this wall guide protects children and toes from injury. [EASY INSTALLATION FOR MANY APPLICATIONS] - The sturdy roller door guide can be attached/installed on the wall with screws. The low-profile sliding door rollers are perfect for indoor/outdoor areas like living rooms or DIY projects like installing carpet over concrete slabs and work great to keep the door/gate flush with the wall. Comes with detailed instructions and is very easy to install. [BUTTERY SMOOTH & QUIET GLIDING] - Our adjustable bottom rollers contain built-in ball bearings, ensuring smooth and effortless gliding. Unlike others with large wheels, they use only two small bearings to keep the door