The Spanner Wrench Tool is required to change a C or D Cell Maglite switch. On each end of the tool are two protruding metal studs that fit either the C or D Cell retaining ring. Changing a D Cell switch that has a D in front of the serial number does not require this tool
Hexagon Wrench Tool is required to change all D Cell switches. the Hexagon Tool is inserted through the centre of the switch to loosen (or tighten) the set screw that holds the switch securely in place
Images should appear here to illustrate the tools, however ebay's system has rejected them, sorry.
We do sell a repair kit in our ebay shop for both tools mentioned above