The SBT, or SRO Battery tool is a dedicated tool designed for use with the Trijicon SRO, RMR HD, Vortex Defender ST and the EOTech EFLX. The SRO and RMR HD both have the battery cover partially covered by the hood of the sight, preventing direct access with a typical screwdriver, requiring the user to angle the tool, preventing full engagement that can lead to cross threading during reinstallation and damaging the slots themselves.