# MACHINERY
> MSHA accident `220123400033` · 12/04/2012 · Martin Marietta Materials, Inc.
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Caught in, under or between a moving and a stationary object
- **Occupation:** Warehouseman, Bagger, Palletizer/Stacker, Store keeper, Packager, Fabricator, Cleaning plant operator
- **Activity:** Hand tools (powered)
- **Injury source:** HAND TOOLS,POWERED,NEC
- **Nature of injury:** FRACTURE,CHIP
- **Body part:** FINGER(S)/THUMB
- **Days lost:** 0
- **Mine experience:** 16.67 years
## Operator
- **Controller:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials, Inc.
- **Mine:** [4402963](https://api.ai-analytics.org/mine/4402963)
## Narrative

Employee was using a 1 inch impact wrench to tighten the tension bolts on the primary jaw crusher.  The tension bolt broke and forced the employee's hand backwards.  He mashed his ring finger between the impact wrench and toeboard.

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