Used Ultion 3star lock with five keys. Measures 35mm inner and 35mm outer with thumbturn on inner. This has come from our front door which was installed 3 years ago. In perfect working order but our lodger lost a key so have had to replace the lock. Replacement cost us over £100 so good chance to pick up a bargain! Note 3 keys are genuine Ultion and 2 are third party replacements. All work perfectly
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