- NELON Mortise Lockset - Key & Thumbturn - Heavy Duty & High Security Product includes: - Lockset as shown (2-sided handle; front and back) - 1 pc of 50mm / 60mm / 70mm backset (up to your choice) - Accessories - Screw to Screw height: ~14cm Colour(s) available: Silver and Antique Brass Antique Brass colour is only available for Model No. N-OL3118 and N-OL3431 Price shown is the starting price; other colours/sizes are priced as listed by NELON. WhatsApp 9898 9268 to confirm your option.