BOSCH GDX18V-1800B12 18V Two-In-One 1/4 In. and 1/2 In. Bit/Socket Impact Driver/Wrench Kit with 2.0 Ah SlimPack Battery - Amazon.com
Bosch GDX 18V-180 Cordless+2 Batteries Blue | Bricoinn
Bosch Professional Power Tools & Accessories Middle East - Hexagon or square? It doesn't matter! Our GDX impact drivers/ wrenches with 2in1 bit holders have 1/4"" internal hexagon and 1/2"" external square