Socket Set 1 4

socket set
A number of detachable sockets of different sizes for use with a socket wrench
A socket wrench, more commonly referred to as a ratchet, is a type of wrench, or tightening tool, that uses separate, removable sockets to fit many different sizes of fittings and fasteners, most commonly nuts and bolts.

1 4
These have a cylindrical connector on the end. They are sometimes also referred to TS (Tip-Sleeve) or TRS (Tip-Ring-Sleeve).