The hexagonal shape at the base of the shaft allows you to hang a spanner and turn it. The size indication on the grip end allows you to distinguish the tip shape.

From the Manufacturer

Features

Hexagonal shape at the base of the shaft allows you to hang and turn spanners.The size indication on the grip end allows you to distinguish the tip shape.

Note:

The anti-fiddle torx wrench is less load capacity than regular torx wrenches, so please be careful to put too much force.