CONTRACTOR-GRADE HEAVY DUTY STEEL: Quarter Inch (1/4") 6mm thick premium industrial steel. These construction-grade shelf brackets outlast flimsy 5mm imports for support of evolving décor trends from minimalism, eclectic, biophilic designs, maximalism, bohemian, or classic styles like rustic farmhouse, cottagecore, or vintage revival. PRO-ENGINEERED 250LB+ LOAD CAPACITY: Engineered for professionals - holds 250 lbs+ per pair with no bounce or sag. Perfect for heavy-duty garage storage, workshop shelves, or open kitchen shelving where lesser brackets buckle. IDEAL FOR PROFESSIONAL DIY BUILDS: Our industrial modern mid-century floating DIY shelf bracket set is built to withstand professional demands, featuring a durable matte iron black iron powder coated finish that is scratch and rust resistant. FITS COMMON LUMBER BOARDS: This open shelf bracket set is designed to perfectly fit nominal size 1" x 10" and 2" x 10" dimensional lumber with actual 9 1/4 inch (9.25") width. BUILDER GRADE HARDWARE INCLUDED - A pro job needs pro tools. We include heavy-duty screws and high-quality drywall anchors for secure, reliable installs right out of the box. No hardware store detours. Our complete kit enables quick and seamless shelving décor refreshes from organic bohemian charm to bold maximalist, or biophilic escapes. 4-PACK MULTI-PURPOSE SHELF SUPPORTS: Maximize space with style. Ideal for countertop supports, mantel ledges, open concept wall shelving for kitchen, bathroom, bedroom, office & more. Thicker, Stronger Brackets - Heavy Duty - 1/4" Thick (6mm) You don't have to settle for thin 5mm weak brackets that cause poor shelving. Our 1/4-inch-thick brackets will safely hold more weight and are sturdier than any other open lip brackets on the market. Made to perfectly fit nominal size 1" x 10" and 2" x 10" dimensional lumber boards found at local home stores. Simply attach a wood plank on top of these floating shelf brackets and you've got a beautiful rustic looking shelf. Manufactured from solid 6mm thick metal with a strong durable matte black powder coat finish, our durable iron shelf brackets are simply made to last.