The STAHLWILLE FastRatch Set, No. 96411005, is a set of five ratchet spanners made from tempered stainless steel. Thanks to patented "opening ring" technology, the tools can operate in tight or awkward spots that traditional ratcheting wrenches can't access. An integrated closing spring allows the tools to consistently grip rounded nuts and screws, even when tension isn't being applied. All five sizes -- 10mm, 11mm, 14mm, 17mm, and 19mm -- come organized in a sturdy roll-up pouch.