# HANDTOOLS (NONPOWERED)
> MSHA accident `220143170011` · 11/11/2014 · Holroyd Co Inc
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** HANDTOOLS (NONPOWERED)
- **Accident type:** Over-exertion in wielding or throwing objects
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Hand tools (not powered)
- **Injury source:** AXE,HAMMER,SLEDGE
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 1.48 years
## Operator
- **Controller:** Stephen  Nielsen
- **Operator:** Holroyd Co Inc
- **Mine:** [4500637](https://api.ai-analytics.org/mine/4500637)
## Narrative

Employee was working on the HP 400 cone crusher pounding out the pins for the bowl assembly and he was moving from one pin to the next walking with the 20lb sledge hammer when he felt his back pop and he pulled his lower back muscle.

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