✅ For 4×4 Rough‑Cut Lumber — Custom‑made for rough‑sawn unplaned 4×4 wood posts, different from standard dressed 3.5″×3.5″ finished lumber, perfect for raw timber DIY pergola builds. ✅ Heavy‑Duty 5‑Arm Central Joint — 1 vertical sleeve for ground post + 4 horizontal arms for cross beams. Connect multiple pergola units to form large patio, L‑shape or multi‑bay outdoor frameworks. ✅ Robust Welded Steel Construction — Laser‑cut, bent and fully welded carbon steel with black powder‑coat finish, excellent rust‑resistant performance for all‑season outdoor exposure. ✅ Fast‑Build DIY Solution — Pre‑punched fixing holes for lag bolts. Greatly cuts down your on‑site fabrication time, no complicated notching or wood cutting required. ✅ Wide Application — Ideal for residential backyard pergolas, patio covers, carports, garden pavilions and commercial restaurant outdoor seating structures. Wood posts are sold separately.