- NELON Tubular Lever Lock - High Security - Exceeded 200,000 cycle tests - 35 - 50mm door thickness Product includes: - Lockset as shown - Adjustable 60 / 70mm backset - 3 keys - Accessories Colour(s) available: Silver, Antique Brass, and Antique Copper Master Key and Key-alike system available upon request, with additional cost. Installation service is also available with additional costs. Engage our trusted locksmith now by WhatsApping us! Price shown is the starting price; other colours/sizes are priced as listed by NELON. WhatsApp 9898 9268 to confirm your option.