US Patent 11235448 Overload protected impact driving device

A torque transfer assembly for a bit holder includes a first lateral member, a second lateral member and a coupling pin. The first and second lateral members extend substantially parallel to each other along opposing sides of an axial channel of a base portion of a drive body of the bit holder. The drive body includes a drive end configured to interface with a powered driver. The coupling pin interfaces between the drive body and a driven body of the bit holder to transfer torque between the drive body and the driven body via engagement between the coupling pin and the first and second lateral members.