Aurora's Whole Realms Catalog for 2nd Edition had three separate toolkits, the Hinge-Removing Set, Keymaking Set and Lockpicks, all three together would make good masterwork thieves tools, and the book described and illustrated their contents in great details.
What was in all three kits combined:
Wax pad for making impressions of keys
Stylus for marking metal key blanks
Blades and Files for cutting keys
Blank keys
Skeleton keys
Miscellaneous wires, rods and angled wrenches of various sizes.
Funnel
Magnifying glass
Hammers in a variety of sizes
Pliers
Small hand drill
Awl
C-Clamps
Vials of oils
Vials of acid
Set of chisels
Listening cone
Toolbelt, cases and pouches to hold it all