Lovely Probably boom metal corner brackets for table legs Loved one spot rack
Steel Table Leg Apron Bracket | Van Dyke's Restorers
Alexandria Moulding Table Leg Corner Plate Mounting Bracket WT061-00CB - The Home Depot
Amazon.com: POWERTEC 71427 Kerf Mount Corner Bracket with Mounting Hardware, Corner Braces for Table Aprons and Table Legs, Set of 4 : Tools & Home Improvement
Waddell 2.4375-in x 2.4375-in Metal Table Leg Corner Plate (4-Pack) in the Table Leg Hardware department at Lowes.com
Surface Mount Corner Brackets for Table Aprons, 4 Pack | Rockler Woodworking and Hardware