2 Hole Square Mount Post Base 90 Degree Fitting Strut Channel Bracket Connector Fit 1/2”Bolt for All 1-5/8”Single Strut Channel, Electro-Galvanized Steel, 4.8 mm Thickness, 2 Pcs, Brackets - Amazon Canada
SuperMag 2-Hole 90-Degree Angle Strut Bracket with Magnets - Strut Fitting - Silver Galvanized ZAB202MEG - The Home Depot