The S version of Birzman's Y-Wrench has a sleeve on each tool that can rotate, so you can screw in the bolt more easily.

You can therefore keep your fingers on the sleeve and turn the bolt at the same time.

The tool has 3 different sizes; 4 / 5 / 6 mm Allen key with ball head.

The tool has a magnet in the middle so you can easily hang it on a tool board, work stand or other metal surfaces.