The icon is a picture of handcuffs. The icon is shaped like two circles attached to a 2 link chain. Each circular object has a key hole looking structure between the hole in the circle and the point it attaches to the links
This Handcuffs icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.