https://www.choierlighting.com/product-page/low-profile-double-bullhorn-round-pole-mount-bracket-with-2-2-3-8-tenons
Low Profile Double Bullhorn Round Pole Mount Bracket with 2 2-3/8" Tenons | Choierlighting
Buy Bullhorn Dual Tenon Adapter, Low Profile 2 Light Bullhorn Light Pole Adaptor for Slip Fit LED Shoebox Parking Lot Lighting, USA Stock.