I`ve been using this 13-piece set for over a year now and it's never failed me once. The sockets fit perfectly on any standard bolt, and the 6-point design ensures no slipping or stripping occurs .The compact carrying case is also a bonus, making it easy to stay organized when working on my motorcycle. The only downside is that the set doesn't include larger socket sizes for bigger jobs, but for general maintenance tasks, it's perfect..