STURDY STEEL BRACKET, ENHANCED ROUND CORNERS: - Fine black powder coated barn door bottom roller guide is strong, durable and rust-proof, flush to the ground/floor, no screws protruding from the bottom, no groove required for the door, no drilling on the floor. Perfectly shaped with round corners, counter-recessed holes and recessed screw heads, this wall guide protects children and toes from injury. EASILY MOUNTED FOR MANY APPLICATIONS: - the door guide heavy duty guyed rollers can be wall mounted/installed with screws, low profile sliding gate rollers look great indoors/outdoors for areas such as living rooms or DIY projects such as carpet over concrete slab, works great to keep the door/gate aligned to the wall; comes with step-by-step instructions, very easy to assemble. SMOOTH & QUIET, GLIDE LIKE BUTTER: - Our bottom adjustable roller wheels contain built-in ball bearings, provide a smooth, effortless ride, and not like others which have big wheels, only two small bearings, keep the door balanced and stable on both sides, just need a little space to install, provide more room to maneuver for perfect alignment of the rollers with the door. ADJUSTABLE ROLLER POSITION: Fully adjustable for different barn door thicknesses, suitable door thickness can be up to 2-13/16 inches when using 2 rollers, up to 3-5/8 inches with inner roller withdraw. By adjusting the position of the rollers in the track to fit your door panel, fit most closet pocket doors.