By popular demand, Astro introduces Nano 5pc Drive Size Adapter Sets in 1/4" (11mm outside hex) and 3/8" drive (17mm outside hex). Astro continues to grow the largest and most comprehensive Nano socket range in the market with highly requested solutions that now turn your Nano socket ratchet into a square drive ratchet, a bit ratchet, or use the included adapters themselves for a multitude of additional uses. Add outside hex flats to your traditional round socket by adding one of these, and drive with an open-end wrench, adapt your impact wrench or ratchet into a new drive size or into a wobble drive end for additional access. The 1/4" 78105 and 3/8" 78305 sets each include impact rated matching wobble square drive, 1/4", 3/8" and 1/2" square drive adapters and super low-profile magnetic 1/4" hex bit adapter, all with lifetime warranty. The combinations are endless, and your Nano socket wrenches just became more versatile than ever allowing you to use them where convenient with your own deep sockets, extensions and the rest of your square drive power tools! Compatible with all Astro Nano Socket Wrenches in 1/4" (11mm hex) and 3/8" (17mm hex) such as 78345, 783105 & 78318