These 38pcs Bits Sets are very portable in size. Can be widely used in more installation and repair work. The bits in the set are made of S2 alloy steel, have a sandblasted surface, have color rings, and come in different models and sizes. In order to easily adapt to various working scenarios, the set is also equipped with 1/4'' drive socket, bit adapteor, 2INI1 socket an bit holder, quick release chunk, hex impact adapter, screwdriver bits, drive 72t ratchet.