Do masterwork thieves' tools exist in 2e, and if so, what benefits to they confer? I can't seem to find any mention of them.
Well I'll be damned. Steve was right. Aurora's has it. Aurora's Whole Realms Catalogue, page 15 - an "expanded" set of lockpicks that gives 20% (!) bonus to open locks and a listening cone for +10% to detect noise.