This set consists of the following components: 
Padlock for metal gate (Art.338)
Dead bolt cylinder for wooden door (Art.668/A)
Cam lock for the letterbox (Art.448/23) 
A set of 4 keys (2 metal and 2 plastic heads) 
Duro locks are built with a revolutionary 12-pin cylinder system which ensures complete locking protection, protecting your house and mailbox from potential theft activities 
Duro's highly secure mechanism uses 2 rows of 6 anti-drilling pins of varying lengths and double-grooves, making their locks nearly impossible to pick by thieves, thus this makes their locks even more trustworthy and safe 
Duro's patented 12-pin cyclinder system offers users myriad key combinations curated to be used with a large number of locks (e.g. profile cylinders, deadbolt cylinders, cam locks and padlocks, etc.) 
One key system capability - one key open all - reduces the hassle of going through your bag/bunch of keys for different locks, extremely convenient