Specification：
• Brand / Model: Universal “Open & Closed Ring” Series – sizes 2 and 36 available
• Material: 100 % solid copper, 25 mm (size 2) or 36 mm (size 36) inner eye diameter
• Thread: M10 internal, supplied with M10 threaded rod, washer & hex nut
• Shank thickness: 9 mm;  overall height: 30 mm
• Finish: full-sealed anti-oxidation coating + decorative knurled band
• Voltage rating: safe for low-voltage lighting ≤ 36 V
• Load rating: tested to 250 lb (113 kg) per hook
• **Packaging: sold only in complete 4-piece sets**—choose all  Size 2 Open, all Size 2 Closed, all Size 36 Closed, or all Knurled Closed

Features：
• Zero-rust, zero-corrosion—pure copper and sealed surface shrug off coastal storms
• Three style choices in one listing:
– Size 2 open ring for fast, tool-free installs
– Size 2 closed ring for tamper-proof suspension
– Size 36 closed ring for grand chandeliers and heavier fixtures
• Knurled grip band adds both texture and a subtle sparkle under light
• Ready-to-mount kit—each of the four hooks arrives with its own M10 rod, washer and hex nut;  no extra hardware-store run
• Fits standard U.S. junction boxes—threads straight into lamp canopy or ceiling strap

Kindly Notice：
• Eye dimensions are measured inside the ring;  allow ±1 mm tolerance from hand-polishing.
• Copper is softer than steel—use only a 10 mm wrench;  overtightening may deform threads.
• For outdoor coastal use, a quick wipe with a dry cloth keeps the mirror finish flawless.