4 Hole, L Shaped 90 Degree Connector Bracket for All 1-5/8" Strut Channel - Heavy Duty, Electro-Galvanized 20 Pack of L Shaped 90° Connector Brackets fit for 1/2" Bolt in ALL 1-5/8" Strut Channels Made from heavy duty 1/4" thick electro-galvanized steel - Zinc coated to prevent rusting and corrosion Connector Bracket has 2 holes on each side mounted 1-3/4" apart (on-center), measuring 1/2" in diameter Plate measures: 3-1/2" long, 3-1/2" wide, 1/4" thick - Fits 1/2" Bolt (NOT included)