Thermal insulation casing

The thermal insultation was a part of the Eleventh Doctor's sonic screwdriver. Sandwiched between the sections of the screwdriver that could extend, it was located above the easy-grip handle which had cooling cells inside. (PROSE: ) In a guide about Time Lords, both annotated and improved by the Eleventh Doctor, he wrote in a section about gadgets that if the screwdriver was to be held it should be held by the handle, else risk burning the user's fingers. (PROSE: )
== History ==
:: See Eleventh Doctor's sonic screwdriver for general information about the screwdriver.
At some point during the Eleventh Doctor's travels with Clara Oswald, he began annotating and improving a guide about Time Lords. He added a section about the gadgets inside the TARDIS, advising any readers to hold the screwdriver by the handle. (PROSE: )
== Behind the scenes ==
to be added
Category:Sonic screwdriver technology