Central sonic cluster
From Tardis Wiki, the free Doctor Who reference
The central sonic cluster was a part of the Fourteenth Doctor's sonic screwdriver, which was surrounded by the wide area dispersal petals. The cage around the cluster was similar to the Twelfth Doctor's second sonic screwdriver (PROSE: Super Sonic [+]Loading...{"page":"36-37","1":"Super Sonic (feature)"}) and a Dalek gunstick. (TV: Dalek [+]Loading...["Dalek (TV story)"], AUDIO: Eye of Darkness [+]Loading...["Eye of Darkness (audio story)"], etc.)