What are the differences for your locks?

Dear Customers,

Thank you for your interest in our products. Regarding the European standard specifications, our locks are currently available in two main sizes:

1. The last two digits of the model number are 41/01:
   The standard specification of the lock cylinder is 40mm/30mm, the front handle (40mm) can be extended by 15mm and the rear handle (30mm) can be extended by 35mm. Suitable for door thicknesses of 50-100mm.
2. The last two digits of the model number are 45/51:
   Standard specification of lock cylinder is 27.5mm/27.5mm, both front handle and rear handle can be extended by 15mm. Suitable for door thickness of 30-70mm.

Please refer to our website for other specific differences.
https://support.welock.com/compare

If you have any questions, please feel free to contact us.