A drum kit, drum set or trap set is a collection of drums and other percussion instruments set up to be played/struck by a single player.

A standard modern kit (for a right-handed player), as used in popular music and taught in many music schools, contains:

A Snare Drum, mounted on a stand, placed between the player's knees and played with drum sticks (which may include rutes or brushes)
A Bass Drum, played by a pedal operated by the right/left foot
A Hi-Hat stand and cymbals, operated by the left foot and played with the sticks, particularly but not only with the right hand stick
One or more Tom-Tom drums, played with the sticks
One or more Cymbals, played with the sticks
All of these are classed as non-pitched percussion, allowing for the music to be scored using percussion notation, for which a loose semi-standardized form exists for the drum kit.

If some or all of them are replaced by electronic drums, the scoring and most often positioning remains the same, allowing a standard teaching approach.

The drum kit is usually played seated on a drum stool or throne. The drum kit differs in general from those traditional instruments that produce melody or chords/pitch even though drums are often placed musically alongside others that do, such as the piano or stringed instruments.