Metric Socket Set Screws

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.

metric
metric function: a function of a topological space that gives, for any two points in the space, a value equal to the distance between them
based on the meter as a standard of measurement; "the metric system"; "metrical equivalents"
A system or standard of measurement
Metric units, or the metric system
measured: the rhythmic arrangement of syllables
A binary function of a topological space that gives, for any two points of the space, a value equal to the distance between them, or to a value treated as analogous to distance for the purpose of analysis

screws
(screw) sleep together: have sexual intercourse with; "This student sleeps with everyone in her dorm"; "Adam knew Eve"; "Were you ever intimate with this man?"
(of an object) Be attached or removed by being rotated in this way
(screw) turn like a screw
Rotate (something) so as to fit it into or on to a surface or object by means of a spiral thread
(screw) prison guard: someone who guards prisoners
Fasten or tighten with a screw or screws