A good socket set (purchased as individual parts or a matched set) is the core of any good toolkit.

DURATECH Ratchet Handle, 3/8” Square Drive, Reversible Ratchet 90-Teeth, Made of Chrome Vanadium Steel, Small Actuation Angle 4° for Tight Installation Spaces
5.0
Use to...
• Undo nuts.
• Undo bolts.
• Hold a shaft still.
Buying Tips
• Some have a 1/4" bit drive too.
• Look for 72 points or higher.
• Padded handles are good.
• Gimballed heads are useful.
Safety Tips
Always wear eye protection.
Consider impact protecting gloves.