This Facom 2-piece Quatro wrench set consists of 2 wrenches offering 8 different sizes. Each size wrench has a 5° ratchet mechanism. With 4 different sizes per wrench, these wrenches are space-efficient and easy to store. Combined, these two wrenches provide the most common sizes, and therefore are ideal for tightening/loosening most nuts and bolts. The smaller wrench has the following sizes: 8mm, 10mm, 12mm, and 13mm.The larger wrench has the following sizes: 16mm, 17mm, 18mm and 19 mm.