A tool used for driving screw-type fasteners by hand. Available in many sizes and screw head profiles.

• A. Allen Wrench Set
• B. Fixed Width Wrench Set
• C. Ratchet Set
• D. Screw Driver

Answer: (D)

The key idea is matching the tool to the fastener it’s meant to turn. A screwdriver is designed specifically to drive screw-type fasteners by hand. It provides a handle for turning torque and a shaft that fits into the screw’s drive recess, with many sizes and head profiles (like flat/slotted, Phillips, Torx, etc.) so you can securely engage different screws without slipping or damaging the head.

Other choices don’t fit as well because they’re designed for different kinds of fasteners. An Allen wrench set works for screws with hex sockets, which is a specific case, not the broad category of screw types. A fixed width wrench set is for bolts and nuts with flat surfaces, not screw heads. A ratchet set is a turning mechanism that works with sockets and can aid with bolts or some screw driving when used with insert bits, but the standard hand tool for driving screws is the screwdriver, specifically designed for that purpose.