The peal of 10 bells was cast by John Taylor and Company in Loughborough in 1920. The firm is one of only two surviving bell founders in Britain and continues trading from the same site today. Each of the bells has a Latin inscription naming a Gaelic Saint along with the bellfounder's mark.

The bells are tuned to a diatonic scale of C with the heaviest bells producing the lowest notes. The smallest bell, usually referred to as the Treble, weighs 311kg. The heaviest bell, the Tenor, weighs 2112kg making Inveraray the second heaviest peal of 10 bells in the world (the heaviest being Wells Cathedral, England).

The bells are mounted on bearings with a wooden wheel which allows them to be swung through a full 360° by a bell ringer in the ringing room below. There is a clapper inside each bell which strikes the lip each time the bell rotates. This is what causes the bell to sound.