Yale B-82-DMG-PB-60 Standard Nightlatch, Standard Security, Dark Metallic Finish/Polished Brass Cylinder, 60 mm Backset - Door Dead Bolts - Amazon.com
Yale night latch spring - www.ultimatehandyman.co.uk
Yale Brass effect Deadlock Night latch, (H)90mm (W)90mm | DIY at B&Q
Night Latch Door Lock GREY Y 89 85 Rim Cylinder 3 Keys + DOOR PULL YALE replace | eBay
Yale P-89-DMG-PB-60 Nightlatch, High Security with Automatic Deadlock, 60mm, Dark Metallic Gray/Brass - Door Dead Bolts - Amazon.com
Itrade Yale Y3 Nightlatch Visi Pack Brass - Etsy
Yale P-89-CH-CH-60 Deadlocking Nightlatch, 60 mm, Chrome Finish, High Security with Automatic Deadlock - Door Dead Bolts - Amazon.com
P1 Double Security Nightlatch 60mm Backset DMG Dark Grey Finish Visi YALP1DMGPB
Amazon.com: Yale P-1-DMG-PB-60 - Double Locking Nightlatch - 60mm - Dark Metallic Finish - High Security can be Locked from Inside with Key : Industrial & Scientific