The icon shows an arrow that is pointing to the right, which has a base with a 90 degree turn. This icon would be seen for an undo button for a document on a computer or similar.
This is a Undo Filled icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.