The image is of two hands that are grasping bars. The two bars are vertical and they are crossed by one horizontal bar. The hands are just fisted around the bars but no other body parts are shown.
This is the Prisoner icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.