Security Ratings Explained
Security Ratings

Hafren Security Ratings

Security Level 1

Entry Level
Fasteners offer protection from vandalism and opportunistic crime. Drivers can be purchased by the general public.

Security Level 2

Enhanced Security
Fasteners are less Common and less Recognizable. Driver Tooling is non-standard and Harder for the general public to buy.

Security Level 3

Medium Security
Rarer (less well-known) products. Supply of driver tooling is controlled, less readily available to buy, enhancing the security of the assembly.

Security Level 4

High Security
Either 1-way permanent fixing, or rare Hafren patented high security products requiring specialist tooling to remove (only available from Hafren approved distributors).

Security Level 5

Maximum Security
Highest security available. Products are either 1-way permanent fixings, or require bespoke exclusive, custom made driver tools to remove.


This security drive ensures that each and every customer has their own unique ‘one-of-a-kind’ drive socket.

As there are millions of variations to the Solok™ drive socket, your driver key will be specific to you, therefore enhancing the level of security. Every new user gets a Solok™ code to which their screws and tools are made, meaning even somebody else’s Solok™ tools will not fit screws made to your code.

  • Engineered to keep other driver bits out
  • Full range of Self Tapping and Metric Machine Screws available made to your unique drive code
  • Manufactured in Carbon Steel and Stainless Steel
  • Available to order in various finishes and other thread types - subject to minimum order quantities

Watch the installation video:


Sizes available to order:

Countersunk or Button Head | Self Tapping Screws | From 4 x 3/4” (2.9 x 9.5mm) to 14 x 2” (6.3 x 50mm)

Countersunk or Button Head | Machine Screws | From M3 x 6mm to M16 x 100mm

Varying minimum order quantities and tooling charges apply


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