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

More specifically, a modern drum kit (for a right handed player), as used in popular music, taught in many music schools, and for which qualifications are available from Trinity College London consists of:

A drum kit is normally played seated on a drum stool or throne.

Most drummers extend their kits from this basic pattern, adding more drums, more cymbals, and many other instruments. In some styles of music particular extensions are normal, for example double bass drums in heavy metal music. On the other extreme but more rarely, some performers omit elements from even the basic setup, again particularly for particular styles of music.

The first recognizable ancestors of the modern drum kit were born in the Vaudeville era. Pecuniary and theater space considerations demanded that fewer percussionists covered more percussion parts. In military and orchestral music settings, drums and cymbals were traditionally played separately by one or many percussionists. The bass drum, snare drum, cymbals and other percussion instruments were all played using hand-held drum sticks. Circa 1890, experimentation with foot pedals began. Many patented their systems such as Dee Dee Chandler of New Orleans 1904-05. Liberating the hands for the first time, this evolution saw the bass drum played (first standing) with the foot of a percussionist and became the central piece around which every other percussion instruments would later revolve. Ludwig-Musser, William F. Ludwig Senior and his brother Theodor Ludwig founded the Ludwig & Ludwig Co. in 1909 and patented the first workable bass drum pedal system, paving the way for what was to become the modern drum kit.

The drum is a member of the percussion group of musical instruments, which is technically classified as the membranophones. Drums consist of at least one membrane, called a drumhead or drum skin, that is stretched over a shell and struck, either directly with the player's hands, or with a drum stick, to produce sound. There is usually a "resonance head" on the underside of the drum, these are usually tuned to a slightly lower pitch than the top drumhead. Other techniques have been used to cause drums to make sound, such as the thumb roll. Drums are the world's oldest and most ubiquitous musical instruments, and the basic design has remained virtually unchanged for thousands of years.

All types of drums such as timpani for example are always tuned to a certain pitch. Often, several drums, other than timpani drums, can be arranged together to create a drum kit.

Drums are usually played by the hand, or by one or two sticks. In many traditional cultures drums have a symbolic function and are often used in religious ceremonies. Drums are often used in music therapy, especially hand drums, because of their tactile nature and easy use by a wide variety of people.

Kit may refer to:

Any collection of items or components needed for a specific purpose, especially for use by a workman, or personal effects packed for travelling, such as: