This 2x20-pin strip, right-angle female header is a perfect companion piece to Adafruit’s 2x20-pin Dual Male Header. It’s a great way to add right-angle capability to a 2x20 pin circuit board either by attaching the right-angle male headers to the board and having a right-angle female header or connecting the female header to Adafruit’s 2x20 Dual Male headers.
Jane you had the answer, then linked to a slightly different product
Pix I note this is a male connector - but are you needing a female ? Hang on … the Adafruit Breakout Helper you linked to is actually in 2 parts to adapt a female socket to male.