Which percussion instrument uses tuned metal bars arranged like a keyboard?

The glockenspiel is a percussion instrument with tuned metal bars arranged like a keyboard.

Players strike its bars with hard mallets, producing a bright, bell-like tone. The bars are usually arranged in two staggered rows corresponding to the white and black keys of a piano keyboard.

The name comes from German words meaning “bell” and “play.” Earlier glockenspiels could use small bells, but the modern orchestral instrument generally uses metal plates or bars mounted in a frame or case.

It is often mistaken for a xylophone or marimba. Those instruments use wooden bars and produce warmer sounds, while the glockenspiel’s metal bars create a higher, more penetrating timbre. A vibraphone also uses metal bars but adds resonators and motor-driven vibrato.