About this article Suitable for quick-change 1/4" chuck systems or directly in the drill chuck / turns any electric/cordless drill into a screwdriver for power nuts / Convenient for quick driving of nuts, bolts and fasteners etc. Holds sockets securely. [Included] 3-Piece Extension Set 1/4 3/8/1/2-inch and Socket Adapter 4-Piece 1/4 to 3/8 - 3/8 to 1/4 Inch - 3/8 to 1/2 - 1/2 to 3/8. Provides versatility and convenience, no matter which tool you choose to use. Ideal for DIY, housekeeping, and most general repairs, not for industrial work. A great addition to any toolbox set. Adapter Set 1/4 - 1/2 Inch 4 Pieces (Connection Piece) Suitable for all types of ratchets, ratchet wrenches, socket wrenches, torque wrenches, handles, etc. Passivatio design ...