It is stable KTC. Although it is not usually used only in a specific place such as 12 corner head bolt, the thinness of the meat of the socket mouth will increase the workability.
The goods themselves are very solid and can be fastened with a considerable torque, but there is security. When it comes to this size with a deep socket, it is selling in a neighborhood shop but selling it is a monoteraw san so shipping is also early so it will be saved.