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 tighteningloosening 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