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Cisa Astral S Anti-Snap Cylinders

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Our Price: £24.30
Inc. VAT: £29.16

Cisa Astral S Anti-Snap Cylinders

Buy Cisa Astral S Anti-Snap security cylinders from only £24.30 - Best UK price guaranteed

The Cisa Astral S cylinders provide the ideal solution against snapping thanks to its unique snap resistant core. 
Featuring a steel laminated core to flex without breaking under attack, the Astral S range provides both security and a great visual deterrent. 


  • Grade 2 drilling and torque resistance
  • Anti-Bump mechanism
  • Grade 6 durability
  • Grade 6 key security
  • Tested to EN1303:2005 - Maximum achievement for Anti-Snap Cylinders
  • BS Kite mark Licence KM532990 (British standard)

Unique key operation - The Cisa Astral S is the only anti-snap security cylinder available which will allow key operation when another key has been left in the opposite side of the door - no lockouts anymore! Ideal for the elderly or infirm.

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  • Ideal for commercial and residential applications
  • Patented laminated steel snap resistant core
  • BKP Bump resistant device fitted as standard
  • Hardened carbonitrided steel pins and drivers resist drilling attack
  • Pick resistant profiled brass pins and drivers
  • 10 pin key bitting system-  offers over 1.6 million key differs
  • DIN standard sintered steel cam provides push resistance to prevent the cylinder being forced out of the lock case
  • Unique clutch cam as standard 
  • Reversible flat key (3 keys supplied as standard - extras available with order or later)

All Cisa Astral S locks are supplied with 3 reversible keys as standard, key card and replacement fixing bolt. Additional keys can be ordered with locks for only £4.20 per key (or at a later date for £5.42 per key) 

How to correctly measure your cylinders

Measure from the CENTRE of the cylinder fixing screw to both ends of your cylinder. If either end protrudes 5mm or more from the handle then reduce this size as the cylinders should fit as flush to the handle as possible. When measured correctly, the internal & external sizes added together should result in the total overall length e.g 35mm + 45mm = 80mm total overall length. Please do not assume that all your locks are the same size! - this is seldom the case! 

Unlike most other Snap Secure locks on the market Cisa Astral S are non-handed, offering equal resistance to snapping and bump key attack from BOTH sides of your door. Example: a 35/50 is exactly the same as a 50/35.


Customer Reviews
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Reviewer: Luke S - Barnsley Barnsley   5 Stars
Fitted in 5 minutes - Great quality locks highly recommended company

Reviewer: Sophia B - London   5 Stars
Very impressed with the Cisa locks. Very smooth operation with reversible key and ability to unlock door from outside when my other half leaves his key in the lock on the inside. Recommended