
The plastic shelves that come with many homemade shelves tend to break when you move the shelves around the shelf. I find it better to have a few on hand than the plastic ones. They don't break and I rarely have trouble fitting them into pre-drilled holes in the shelf.

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

Heavy Duty 10" Folding Shelf Brackets - Stainless Steel Collapsible DIY Bracket For Bench Table, Max Load 550Lb (2 PCS)
34 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

YUMORE Folding Shelf Brackets 20", Max Load: 330Lb Heavy Duty Stainless Steel Collapsible Shelf Bracket For Table Work Bench, Space Saving DIY Bracket, Pack Of 2
17 Review

Silver Holographic Stars Glitter Grout Tile Additive 100G - Easy To Use For Tiles, Bathroom, Wet Room & Kitchen
14 Review

Pack Of 1 Natural Wood Color 8 Ounce Bottle Gorilla Wood Glue
42 Review

32Oz Gorilla White Waterproof Patch & Seal Liquid For Effective Sealing (Single Pack)
30 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