Weidmueller SDQ T HANDLE T20

SDQ T HANDLE T20 likely refers to a Torx key (sometimes called a star key) with a T-handle.  "SDQ" is likely the brand or product line. "T HANDLE" indicates the tool has a T-shaped handle for better grip and leverage. "T20" refers to the Torx head size, a specific star-shaped size. Therefore, this is likely a Torx key, size T20, with a T-handle.