Well-crafted and durable, featuring craftsmanship, and can be widely used in converting any air or power impact wrench into a drill or ratcheting wrench. Professional drill socket adapters, will provide you with good service and support your repeated use. Features -Color:Black -Material:Chrome-vanadium steel -Size:3.80X2.30X2.30cm/1.49X0.90X0.90in -Size:5.00X2.30X2.30cm/1.97X0.90X0.90in -Type: 1/2 inch Square Drive to 1/4 inch Socket -It can be used in construction, automobile maintenance, mechanical maintenance, etc. -Quick release mechanism allows for easy swapping between bits while working. -These are impact wrench adapters, can easily transform power impact wrench to a drill. -1/2 inch square to 1/4 inch adapters, great for power tools, giving you different tools. -Must-have converter adapter if you plan to work on car or woodworking around the house. Package list: 4 x Adapters (Spring) 4 x Adapters (Ordinary)