• About
    • Meet the team
    • Remembering Richard Knight
    • Manufacturing
  • Careers
  • News
  • Testimonials
Chichester: 01243 641272 | Liskeard: 01579 529298
Knight Fencing
  • Shop
    • Fence Panels
      • Heavy-Duty Closeboard Fencing Panels
    • Garden Furniture
      • Arbours & Arches
      • Wooden Garden Furniture
      • Grow Your Own
      • Garden Planters
      • Gazebos
    • Massive Clearance – Everything Must Go!
      • View All Clearance
    • Tools
      • View all tools
    • Brands
      • Draper Tools
      • Knight Fencing
      • Zest
  • Residential
  • Commercial
  • Agricultural
  • Contact
  • Get A Quote
    • Domestic & Residential
    • Commercial & Industrial
  • Click to open the search input field Click to open the search input field Search
  • Menu Menu
  • Shopping Cart Shopping Cart
    0Shopping Cart

Alexandra Protek 358 Clamp

The Protek 358 Prison mesh flat panel system is designed to provide a very high level of security that is almost impossible to climb, with the narrow apertures of the mesh preventing any intruder gaining a foothold, whilst retaining a good level of visibility and an aesthetically pleasing appearance. This system is used extensively by the Ministry of Defence around high security sites.

ALEXANDRA SECURITY NON-STANDARD FENCE OPTIONS
ALEXANDRA SECURITY GENERAL MESH PROTEK 1000
  • A photo of an Alexandra Protek 358 Clamp Fence

Protek 358 Clamp Specification

Fixing

Posts, Clips & Fixings

The posts and full length clamp bars that Knight Fencing offers provide a fixing system which secures the panels but allows for variations. The system is easy to install and allows the panels to be stepped, helping the fence line to follow the contours of the ground. With the vandal resistant security fixings this post and clamp system.

Options

  • Threaded insert posts available
  • System is available in a galvanised finish using galfan panels
  • Refer to Anti-Climb section on pages 114-119 of our brochure for more options for this product
  • Metal clips

Finishes

Product and Finish Standards

  • Mesh panel wire manufactured to BS 4102 and galvanised to BS EN 10244-2:2001 class D, weld strength is 75% of the minimum tensile strength of the wire (tensile range 540-690 N/m2)
  • Post material manufactured to BS EN 10210-2:1997 and galvanised to BS EN 10346:2009
  • Panels & Posts are powder coated to BS EN 13438:2005 (min 100 micron)

You may also be interested in our full range of Protek security fencing 

Technical Specification for Protek 358 Clamp

*Subject to change
Fence height
(m)
Panel Size WxH (mm) Overall Length of Post Post Size (mm) No. Fixings: Ends / Inters (1 Clamp) No. Fixings: Corners (2 Clamps)
1.2 1274 x 2519 1800 60 x 60 5 10
1.8 1833 x 2519 2450 60 x 60 7 14
2.0 2011 x 2519 2600 60 x 60 7 14
2.1 2138 x 2519 2800 60 x 60 8 16
2.4 2442 x 2519 3100 60 x 60 9 18
2.7 2704 x 2519 3500 60 x 60 10 20
3.0 3001 x 2519 3800 80 x 80 11 22
3.3 3306 x 2519 3800 80 x 80 11 22
4.2 4208 x 2519 5500 100 x 50 15 30
5.2 5211 x 2519 6800 120 x 60 19 38

Unbeatable Installation Guarantee

We guarantee our commercial fencing installation for 10 years because we are confident it will last.

Unlike many commercial fencing contractors who only provide the manufacturer’s warranty for materials, we also cover our installation.

You can trust that our work will hold up for a decade longer than anyone else’s.

Knight Fencing 10 Year Installation Guarantee Badge

Quick Quote for Commercial Fencing and Gates

If you’re looking for reliable, experienced commercial fencing contractors, Knight Fencing is the trusted supplier you’ve been looking for.

We offer a free site visit and quotation, ensuring you get the best fencing and gate solution for your commercial property.

Contact us today to discuss your project and get expert advice from our team.

Phone Phone Call sales 01243 641272
Knight Fencing Quote

Use Quick Quote and you can get a quote for your commercial fencing and gates in a fraction of the normal time.

Get a Quick Quote
  • Acoustic Fencing Range
    • Highway Noise Barrier
    • Jakoustic Fencing
  • Apollo Rolled Top
  • Athena
  • Ball Court and MUGA Range
    • Bekasport Plus Ball Court Fencing
    • Bekasport Sports Fencing
  • Barbed Wire Fencing Range
    • High Tensile Barbed Wire Fencing
    • Mild Steel
    • Razor Barbed Wire Fencing
  • Bow Top Railings
  • CLD Fencing Range
    • CLD DULOK
    • CLD DULOK-8 SR1
    • CLD DULOK-LITE
    • CLD ECLIPSE-60
    • CLD EXEMPLA
    • CLD FLEXA-RAIL
    • CLD LOCKMASTER SWING GATES
    • CLD MULTIPLUS
    • CLD ROTOP
    • CLD SECURUS
    • CLD SECURUS LITE
    • CLD SECURUS PROFILED
    • CLD SECURUS SR1
    • CLD Sports Rail Sports Fencing
    • CLD ULTIMATE
    • CLD ULTIMATE EXTRA SR1™
  • Concrete Panel Walling
  • Delta Sliding Gate
  • Digga Earthmoving Machinery Attachments
  • High Security Fencing for Critical National Infrastructure
  • Nylofor Range
    • Nylofor 2D Regular
    • Nylofor 2D Super
    • Nylofor 3D
    • Nylofor 3M
    • Nylofor F
  • Paladin Fencing Range
    • Paladin Classic
    • Paladin FX
  • Palisade Fencing
  • Pallas
  • Parking Facilities
    • 9000 & 9100 Automatic Sliding Gates
    • 9000M Cantilever Manual Sliding Gate
    • 9500 Bi-Folding Gates
    • Turnstiles
  • Posts and Bollards
  • Protek Range
    • 656 Protek Rebound
    • Protek 1000
    • Protek 2000
    • Protek 358 Clamp
    • Protek 656 Clamp
    • Protek 656 Clip
    • Protek 868 Clamp
    • Protek 868 Clip
    • Protek Spectator Rail
  • Robusta Gate Range
    • Bekamatic
    • Swing Gates
  • Roll Top
  • Rylock Green Fencing
  • Rylock One
  • Securifor Range
    • Securifor 2D
    • Securifor 358
    • Securifor 3D
    • Securifor Super 6
  • Security Fencing and Gates
  • Security Fencing Brands
  • Security Fencing Systems
  • Security Gates Range
    • Security Gate
  • Sentinel Chainlink Super 70
  • SiteGard Gates
    • SiteGard Double-Leaf Bi-Folding Temporary Site Gate
    • SiteGard Double-Leaf Temporary Site Gate
    • SiteGard Single-Leaf Temporary Site Gate
  • Sports & Spectator Fencing
  • Stock Fencing range
  • Triton
  • Ultra Fence: Palisade Security Fencing
  • Ultrabar Railings
  • Vertical Bar Railing
  • Zenith Fencing Systems
    • Zenith 358
    • Zenith Double Skin High Security Fencing
Excellent
Knight Fencing
Based on 65 reviews
See all reviews
review us on
Kirsty O.
Fantastic service item arrived in perfect in condition very promptly would highly recommend 🙂
Mark H.
A massive mention for Jade who throughout the process of my purchasing and having installed two new large rear gates has been exemplary, customer service should be taught at retail outlets by this young lady. Thank you and the gates look great.
Alastair H.
Great job on my fencing and gates from Knight fencing. Five star service.
shaun C.
This is the 3rd time we have used Knight Fencing Ltd and I can’t recommend them highly enough.A quality product built by a courteus team.
Deborah O.
We had a new gate installed and our double security gates made higher.

The workman were friendly, efficient and the work was carried out to a high standard.

We would highly recommend knight Fencing

Michael & Debbie O'connor x
Michael P.
Knight installed new fencing for my rear garden. Looks great and I am very pleased with their service.
Sam K.
I couldn’t be happier with my new fence! From start to finish, the team was professional, efficient, and attentive to every detail. They offered expert advice on the best materials and design for my property, and the installation was seamless. The quality of the craftsmanship is outstanding, and it has truly transformed the look of my garden. I highly recommend this company to anyone looking for reliable, high-quality fencing. Excellent service and amazing results!
Sam C.
Brilliant service and great quality. Will be using them again as required.
Jon B.
First rate job in our boundary fence installed in awful weather yet care taken to ensure all levels are correct!
Malcolm B.
In June 2025 excellent fitters Kevin and George from Knight installed these well made Iroko double gates.

Trusted, Accredited, and Committed to Excellence

Association of Fencing-Industries
DuraPost Trained Installer
SMAS Worksafe preferred supplier
Postsaver Approved Installer
AJS Training
Constructionline Gold Member
CLD approved installer
Checkatrade.com members
CHAS accreditation advanced
Alexandra recommened installer

Trusted, Accredited, and Committed to Excellence

Association of Fencing-Industries
DuraPost Trained Installer
SMAS Worksafe preferred supplier
Postsaver Approved Installer
AJS Training
Constructionline Gold Member
CLD approved installer
Checkatrade.com members
CHAS accreditation advanced
Alexandra recommened installer

Helpful Guides

  • A Guide To Security Fencing
  • A Guide To Product Finishes
  • A Guide To Fencing & Your Boundary Rights
  • Free Guide For School Fencing For Specifiers
  • Guide to Sports and Spectator Fencing
  • Guide to installing timber gates
Knight Fencing
Based on 61 reviews

Locations

  • Fencing Contractors Brighton and Hove
  • Fencing Contractors Chichester
  • Fencing Contractors Crawley
  • Fencing Contractors East Sussex
  • Fencing Contractors Hampshire
  • Fencing Contractors Portsmouth
  • Fencing Contractors Southampton
  • Fencing Contractors Surrey
  • Fencing Contractors West Sussex
  • Fencing Contractors West Country

News, Tips and Advice

  • Apprentice of the Year at the Association of Fencing Industries (AFI) Fencing Awards 2025
    Apprentice of the Year at the Association of Fencing Industries (AFI) Fencing Awards 2025November 17, 2025 - 2:01 pm
  • 2025 Chichester Christmas Tree supported by Knight Fencing
    Knight Fencing sponsors the Chichester Christmas treeNovember 13, 2025 - 1:02 pm
  • IT’S CHRISTMAS TOY APPEAL TIME!November 11, 2025 - 9:40 am
© Knight Fencing Ltd® MMXXV Knight Fencing® is a registered trademark

Website by Pallant
  • Link to Facebook
  • Link to Instagram
  • Link to X
  • Link to LinkedIn
  • Link to Pinterest
  • Careers
  • Delivery Information
  • Returns
  • Terms and Conditions
  • Privacy Policy
  • Cookies Policy
Scroll to top Scroll to top Scroll to top
Knight Fencing
Based on 61 reviews