# HANDTOOLS (NONPOWERED)
> MSHA accident `220192180012` · 07/10/2019 · Northstar Materials Inc dba Knife River Materials
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** HANDTOOLS (NONPOWERED)
- **Accident type:** Over-exertion in pulling or pushing objects
- **Occupation:** Master mechanic, Foreman, Supervisor
- **Activity:** Hand tools (not powered)
- **Injury source:** WRENCH
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** SHOULDERS (COLLARBONE/CLAVICLE/SCAPULA)
- **Days lost:** 29
- **Mine experience:** 11 years
## Operator
- **Controller:** MDU Resources Group Inc
- **Operator:** Northstar Materials Inc dba Knife River Materials
- **Mine:** [2103626](https://api.ai-analytics.org/mine/2103626)
## Narrative

Employee was lowering light plant, crank handle was loose, got wrench to tighten bolt on handle, wrench slipped off bolt head, employee felt pop in right shoulder and pain.

---
*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*