Steel Angle cover strip.
eBay
6Pcs Stainless Steel 90 Degree Angle L Shaped Bracket, 40mm X 40mm X 16mm Corner Brace Joint Bracket Fastener Heavy Duty Metal
Aliexpress UK
Steel Folded Angle 25mm x 20mm x 2mm 1000mm long.
eBay
24 flat straight support brackets, silver flat repair plate stainless steel fixed angle brackets, used for wooden furniture
Aliexpress UK
83x83 x 150mm Long. 10mm Thick Steel Angle Brackets. 12.5 mm Holes @ 115mm centers.
eBay
Black Metal 90 Degree Angle Corner Bracket Adjustable L-shaped Heavy Duty Iron Large Corner Shelf Brackets for Wooden Furniture
Aliexpress UK
Mild Steel Folded Angle weld on brackets 52mm x 52mm x 3mm Thick 75mm long.
eBay
NAIERDI 10 Pack Corner Brace Stainless Steel 90 Degree Angle Corner Brackets L Bracket Firmware for Wooden Shelves,Chairs,Tables
Aliexpress UK
Corner brackets, can be used in a variety of furniture, hardware accessorie. 4 x Corner Brackets. The product uses 1.5mm iron material, to for ensure a strong support capacity. Material: Iron. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
eBay
Aluminum 2020 Corner Bracket fitting 2028 2040 3030 4040 Corner Angle Bracket for Connector Aluminum Profile CNC Router
Aliexpress UK
100mm x 100mm (inside) 3mm Thick Steel Angle. Made from top quality cr4 cold rolled sheet steel.
eBay
2PCS Triangle Folding Angle Bracket Heavy Support Stainless Steel Adjustable Wall Shelves Mounted Table Shelf Bracket for Bench
Aliexpress UK
8mm Steel Angle Brackets. 130mm x 130mm 327MM Long. 12mm Holes on one side only.
eBay
Suitable For Ring Video Doorbell visual doorbell bracket angle adjustable doorbell protective case anti-theft bracket
Aliexpress UK
Steel Angle 4mm Thick 100mm x 100mm x 294mm Long.
eBay
12pcs L-Shaped Corner Brackets Metal Corner Braces Drawer Shelf Wall Bracket Fixing Right Angle Corners Brace Furniture Hardware
Aliexpress UK