News 2025-08-25
Razor coils—also called razor wire or concertina— are modern perimeter-security barriers made from razor-sharp steel tape wrapped around a high-tensile core wire. The blades create a strong psychological and physical deterrent: they snag, pierce, and cut, making climbing and tampering extremely difficult. Both the strip and core wire are typically galvanized for corrosion resistance; stainless steel options are available for aggressive environments.
Our razor wire products have been supplied to Europe, the USA, Southeast Asia, the Middle East, Africa, and other regions.
How razor coils work
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Blade deterrence: Closely spaced “razors” cause painful snagging and cutting.
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High-tensile core: Springy 2.5–3.0 mm core wire resists stretching and cutting.
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Geometry: Coils, clips, and support wires maintain a dense, hard-to-penetrate barrier.
Product types
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Concertina Wire (Crossed Razor Barbed Wire)
Two coils of stainless or zinc-coated razor wire are bound together with clips. When expanded, the spirals intersect to form a stable, high-deterrence “tunnel.”
Use cases: Military and correctional perimeters, substations, high-risk industrial sites, mine boundaries. -
Single-Coil Razor Wire
Installed without clips, single-coil barbed tape runs in its natural loops along walls or fences. It is fast and cost-effective to deploy, providing strong deterrence with simpler hardware.
Use cases: Wall-tops, estates, light industrial, farms—where quick installation matters. -
Razor Flat Fence (Flatwrap)
A low-profile razor-tape system clipped to linear support wires so the barrier sits close to the wall or fence line.
Common sizes: 500 mm × 15 m, 700 mm × 15 m, 900 mm × 15 m.
Use cases: Urban boundaries, tight servitudes, property lines requiring neat aesthetics. -
Welded Razor Wire Mesh
Sheets or panels welded from razor tape/cores to form a rigid mesh. Delivers very high anti-cut/anti-climb performance with a more architectural look.
Use cases: High-security compounds, gates and windows, sensitive infrastructure.
Materials & finishes — Razor coils
| Item | Specification |
|---|---|
| Core wire | High-tensile steel, typically 2.5–3.0 mm |
| Razor tape | Galvanized steel strip; stainless steel optional |
| Coatings | Standard zinc-coated (galvanized) or full stainless constructions |
| Environment | Choose stainless or heavier zinc coating for coastal/chemical sites |
Blade profile codes
| Reference No. | Style | Thickness (mm) | Wire Dia. (mm) | Barb Length (mm) | Barb Width (mm) | Barb Spacing (mm) |
|---|---|---|---|---|---|---|
| BTO-10 | Barbed Tape Obstacle (BTO) | 0.5 ±0.05 | 2.5 ±0.1 | 10 ±1 | 15 ±1 | 25 ±1 |
| BTO-22 | Barbed Tape Obstacle (BTO) | 0.5 ±0.05 | 2.5 ±0.1 | 22 ±1 | 15 ±1 | 35 ±1 |
| BTO-30 | Barbed Tape Obstacle (BTO) | 0.5 ±0.05 | 2.5 ±0.1 | 30 ±1 | 18 ±1 | 50 ±1 |
| CBT-60 | Concertina Barbed Tape (CBT) | 0.5 ±0.05 | 2.5 ±0.1 | 60 ±2 | 31 ±1 | 100 ±2 |
| CBT-65 | Concertina Barbed Tape (CBT) | 0.5 ±0.05 | 2.5 ±0.1 | 65 ±2 | 21 ±1 | 100 ±2 |
Technical specifications
A) Single-coil (no clips)
| Outside Diameter | No. of Loops | Standard Length per Coil | Type | Notes |
|---|---|---|---|---|
| 300 mm | 33 | 4–6 m | CBT-60/65 | Light duty |
| 450 mm | 33 | 7–8 m | CBT-60/65 | Wall-top common |
| 500 mm | 56 | 12–13 m | CBT-60/65 | Standard |
| 700 mm | 56 | 13–14 m | CBT-60/65 | High barrier |
| 960 mm | 56 | 14–15 m | CBT-60/65 | Extra-large coil |
B) Cross-type concertina (with clips)
| Outside Diameter | No. of Loops | Standard Length per Coil | Clip Density | Blade Type Options | Notes |
|---|---|---|---|---|---|
| 450 mm | 56 | 8–9 m | 3 clips | BTO-10 / BTO-22 / BTO-30 | Standard |
| 500 mm | 56 | 9–10 m | 3 clips | BTO-10 / BTO-22 / BTO-30 | Standard |
| 600 mm | 56 | 10–11 m | 3 clips | BTO-10 / BTO-22 / BTO-30 | Medium barrier |
| 700 mm | 56 | 10–12 m | 5 clips | BTO-10 / BTO-22 / BTO-30 | Higher strength |
| 800 mm | 56 | 11–13 m | 5 clips | BTO-10 / BTO-22 / BTO-30 | High security |
| 900 mm | 56 | 12–14 m | 5 clips | BTO-10 / BTO-22 / BTO-30 | Large perimeter |
| 980 mm | 56 | 14–16 m | 5 clips | BTO-10 / BTO-22 / BTO-30 | Extra heavy duty |
Clip density: 5-clip systems provide tighter geometry and higher resistance to prying/sag than 3-clip systems (choose based on risk level and wind load).
C) Flatwrap (razor flat fence)
| Width × Length per Roll |
|---|
| 500 mm × 15 m |
| 700 mm × 15 m |
| 900 mm × 15 m |
Packing options — Razor coils
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Simple packing
Inner: water-proof paper · Outer: woven bags
Loading: coils loaded individually or bundled for easier handling
Typical models: BTO-10/12/22/30 and CBT-25 -
Carton packing
Used mainly for CBT-60/65 (450 mm) due to blade length/handling safety. -
Special packing
Custom solutions available on request (export branding, specific handling rules).
Installation guidance (field-tested, practical)
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Supports & spacing: For concertina on wall-tops, use sturdy brackets/plates at appropriate intervals; for flatwrap, clip to 2–3 line wires (e.g., 2.5 mm) with consistent spacing.
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Fasteners: Use stainless clips and fixings in coastal or corrosive locations.
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Tension & overlap: Maintain consistent tension; overlap coil ends and secure with multiple clips/ties.
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Integration: Pairs well with palisade, ClearVu/358, chain-link, or masonry walls.
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Safety: Mandatory PPE (gloves, eye/arm protection). Add warning signage where public contact is possible.
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Compliance: Check local bylaws/estate rules for placement height, boundaries, signage.
Applications — Razor coils
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Industrial plants, logistics yards, warehouses
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Prisons, defense sites, and critical infrastructure
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Estates, farms, and residential wall-tops
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Substations, telecom towers, and utility corridors
Buying checklist — Razor coils
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Risk level → coil choice: Single-coil for fast, economical deterrence; concertina for higher security; flatwrap for neat, tight boundaries; welded razor mesh for maximum rigidity.
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Diameter & clips: Larger diameters and 5-clip concertina increase deterrence and stability.
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Material & coating: Choose stainless or heavy zinc for harsh sites.
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Accessories: Specify bracket type, clip material, support wires, and number of clips per turn.
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Logistics: Confirm coil lengths, packing method, and any special export requirements.
Conclusion
Razor coils remain one of the most effective and versatile perimeter security solutions available today. With multiple configurations—including single-coil, concertina, flatwrap, and welded mesh—these barriers can be tailored to suit environments ranging from residential estates to critical infrastructure and defense sites. By combining razor-sharp blades, high-tensile core wire, and robust installation methods, razor coils provide both a powerful psychological deterrent and a physically impenetrable barrier.
Whether galvanized for standard use or manufactured from stainless steel for coastal and chemical environments, our razor coil products are engineered to deliver long-term durability, safety, and performance. For projects requiring proven, field-tested perimeter protection, razor coils offer a cost-effective and professional solution.
