✅Special outer pentagonal anti‑theft head design, prevent unauthorized disassembly, high security performance.

✅ Made of premium stainless steel / carbon steel, excellent rust‑proof and corrosion‑resistant performance.

✅ Integrated flange face, larger bearing surface, better anti‑loosening effect, no extra washer needed.

✅ Precise full thread rolling, uniform thread, smooth tightening, stable locking under heavy‑load condition.

✅ Widely used for highway guardrail, railway, traffic facilities, cabinet, fence anti‑theft fastening.

✅ Strict dimension inspection, factory direct wholesale, mixed order acceptable.