The Mechanical Acuity set is part of the Clockwork City DLC. The crafting station is located in Clockwork City, south of the Clockwork Crossroads Wayshrine (Pavillion of Artifice). You need to have at least 6 traits researched to be able to craft this set. You can craft the set in any trait and motif style that you know, and you can trade the crafted item pieces to other players. Each set item becomes bound on equip.