Double check your letterbox and where the fittings would need to sit to check that you have space as all letterboxes are fitted internally different and you may have screws that would prevent the slots sitting in your letterbox.
eBay
Wall Mailbox Code Lock Letterbox Postbox Pillar Letter Mail Post Box Easy Assembly 21.49x8.99x32 cm Charcoal Grey Large Capacity
Aliexpress UK
It’s designed to suit doors with a thickness of 40mm to 80mm and is compatible with timber, composite, and uPVC doors. Suitable for timber, composite, and uPVC doors. With over 40 years of experience in the industry, our team has done it all.
eBay
Security Door Viewer Peephole for Front Door for w/Privacy Cover Optical Glass L Drop ship
Aliexpress UK
Select your Colour: White, Brass or Aluminium Extra Security for Doors Easy to fit, simply screw onto inside of door Screws provided - Please check length is suitable for your door See picture for dimensions A visor guard will protect you against the latest trend of criminals to try and "fish" keys by using hooks. Young arms that can fit through the letterbox are sometimes able to unlock a nightlatch.
eBay
KAK E9 Series Archaize Super B Grade Padlocks Safe Anti-Theft Lock Rustproof Antique Bronze Top Security Locks For Home Hardware
Aliexpress UK
345mm in length. Height 65mm. Depth 60mm Dark gold finish. A visor guard will protect you against the latest trend of criminals to try and "fish" house and car keys left near your door, by using hooks on a line that go through your letter box.
eBay
Security Cash box Key Safe Box Key Locker Safe Home Shop Steel Safe Money Box Storage Hidden Coin Money Jewellery
Aliexpress UK
Features a lockable internal flap with two sets of keys. Whether you're planning to treat yourself to a new garden bench or redecorate your kitchen, we've got lots of lovely things to choose from. Wall mountable.
eBay
Home Door Window Security Bolt Lock Button Open Type Chrome Plated Zinc Alloy 88*32mm Rust-proof Durable
Aliexpress UK
Suitable for window door locking, opening and closing handle lock for you to use. 1 Window lock. Provides for extra security to your windows. Due to the difference between different monitors, the picture may not reflect the actual color of the item.
eBay
24-hour video surveillance Metal Sign Plaque Security Warning Decorative Plates For Outdoors Man Cave Hotel Home Wall Decor
Aliexpress UK
Outward opening letter collection flap. Can be mounted on a wall. Complete with screws and wall fixings.
eBay
Small mini High Quality Strong Steel Padlock Travel Suitcase Diary Lock Luggage Schoolbag Anti-theft Security Padlock 2 Keys
Aliexpress UK
1 x Personalised Black Letterbox. All trade and personalised. Secure Locking – 3-digit combination lock – No keys needed for a hassle-free experience. Keyless Security – No more lost keys! Set your own 3-digit combination lock for protection.
eBay
Dictionary Mini Book Safe Security Key Locker Money Hidden Secret Safe Key Safe Box Cash Lock Box Money Coin Storage Jewellery
Aliexpress UK