On 3/17/2021 EE was loosening the toggle plate tension rod's 85mm nut, rod broke. The spring violently released hitting wrench and cheater pipe, which struck EE in the palm of left hand and under chin. EE was treated for a contusion & released. On 4/16/2021 EE sought medical treatment for same injury and was placed on restrictions making this a reportable incident on 4/16/2021.