I didn't buy these to mount shelves for their intended purpose. Instead, I bought them to give extra support to a concrete countertop I made. Most of the weight of the tabletop rests on the bar itself, so they're just adding a little extra support to the bar. For that purpose, they seem to get the job done. They had some flex when mounted vertically, but not much. I'm sure they're great for attaching shelves.
ETECHMART 5 Inch Wall Mounted Floating Shelf Bracket, Pack Of 4 L Shape Heavy Duty Rustic Iron Metal Corner Brace Shelf Supporter For DIY Open Shelving Decoration - Black
20 Review
L Bracket Corner Brace, YUMORE 4'' X 1'' Stainless Steel Right Angle Bracket, 90 Degree Bracket Fastener For Wood Shelf, Furniture, Cabinet, 4 Pack
16 Review
Collapsible Shelf Brackets - Heavy Duty Metal Folding Bracket For Wall Mounted Bench, Table, Or Shelf, Space Saving Hinge Design, 2 Pack, Maximum Load Capacity Of 150 Pounds (14 Inch, Black)
27 Review
Pack Of 6 ETECHMART Rustic Iron Metal L-Shaped Shelf Brackets, 5 Inch Wall-Mounted Support For DIY Open Shelving, Heavy-Duty Corner Brace Shelf Supporter In Black
29 Review
πͺ Bondic UV Liquid Plastic Welder - Fast Cure, Strong Adhesive Repair Kit for Home, Garage, Outdoors, etc. - Complete Starter Set (LED Light & Liquid Cartridge in Compact Tin Case)
9 Review
Silver Holographic Stars Glitter Grout Tile Additive 100G - Easy To Use For Tiles, Bathroom, Wet Room & Kitchen
14 Review
Hemway Glitter Grout Tile Additive: Sand Gold Sparkle For Your Bathroom, Kitchen And Wet Room Tiles - Easy To Use And Temperature Resistant!
10 Review
32Oz Gorilla White Waterproof Patch & Seal Liquid For Effective Sealing (Single Pack)
30 Review